(2b,3a,5a,16b,17b)-2-(4-Morpholinyl)-16-(1-pyrrolidinyl)androstane-3,17-diol

1. product basic information table

2. Nature (Properties)

the compound is a double amino substituted diol intermediate derived from the steroid skeleton, and its physical and chemical behavior is characterized by “high lipophilicity, extremely low volatility, and low temperature and moisture avoidance storage.

From the structural point of view, it introduces morpholino at the C- 2 position and pyrrolidinyl at the C- 16 position on the 5α-androstane-3α, 17β-diol skeleton. The introduction of two tertiary amine groups increased the polarity and basicity of the molecule to a certain extent, but the four-ring fused hydrocarbon skeleton of the steroidal parent core was still dominant, making the overall LogP in the medium partial lipophilic range (MolBase record LogP ≈ 3.01). This determines that it is almost insoluble in water and has a certain solubility in most conventional organic solvents.

The physical form is white to light yellow crystalline powder, the melting point is concentrated at 161-169°C, the predicted boiling point is around 565°C (760 mmHg), the flash point is about 295°C, and the vapor pressure at 25°C is only 10 · · · mmHg, which indicates that almost no inhalable vapor is generated under normal temperature and pressure operating conditions, and the process safety risks are mainly concentrated in dust exposure rather than volatile inhalation. The storage conditions require 2-8 ° C., sealing and drying, mainly to prevent the side reaction of oxidation or hydrolysis of the morpholine ring and the pyrrolidine ring under humid heat conditions, while maintaining the stability of the diol hydroxyl group.

3. Use (Applications)

the core use of this compound is highly concentrated: it is a key steroid intermediate in the synthetic route of the skeletal muscle relaxant rocuronium (Rocuronium Bromide) and is often circulated in the industry under the code name “LK-7.

Rocuronium is a widely used non-depolarizing neuromuscular blocking agent in clinical anesthesia for tracheal intubation and skeletal muscle relaxation during surgery. This intermediate is converted to the rocuronium bromide active ingredient through subsequent steps such as quaternization; it C- 2 the introduction of morpholinyl and C- 16 pyrrolidinyl groups, which are the precursor steps for the construction of the two key basic side chains in the rocuronium bromide molecule. Therefore, the quality of the product is directly related to the impurity profile and yield of the downstream rocuronium drug substance.

In more upstream R & D scenarios, the compound is also used as a reference molecule for steroidal structural modification and structure-activity relationship studies to investigate the effect of amino substitution on the biological activity and metabolic stability of the androstane skeleton, but the main body of commercial demand is still anchored in the rocuronium industry chain. For intermediate suppliers, the ability to stabilize and scale compliant production LK-7 means that they occupy a position with clear technical thresholds and high customer stickiness in the upstream supply chain of narcotic muscle relaxants.

4. Safety Information (Safety Information)

the existing public databases do not give a uniform GHS hazard classification for this substance, but this does not mean that operational safeguards can be relaxed.

Judging from the chemical structure, the compound contains both tertiary amine group and diol structure, and has potential irritation to respiratory tract, eyes and skin in the form of dust. The operation should follow the general protection principle of fine chemical intermediates: weighing and feeding under the condition of fume hood or local exhaust; Wear dust mask, chemical protective gloves and goggles; Avoid dust diffusion and long-term skin contact.

The core safety requirements for storage are low temperature, airtight, dry, and away from strong oxidants and acids. Morpholine ring and pyrrolidine ring under strong acid conditions may be open or salt formation behavior changes, diol hydroxyl may be oxidized to ketone under oxidation conditions, so it should be avoided with strong acid, strong oxidant mixed storage. In case of leakage, dust shall be collected by wetting to avoid dust emission caused by dry sweeping, and the collected materials shall be treated as chemical waste. Specific first aid measures (such as moving to fresh air after inhalation, rinsing with plenty of water after skin contact, rinsing after eye contact and seeking medical attention) should be carried out according to the SDS provided by the supplier. The product is usually positioned as an industrial intermediate/R & D use, not for direct use by humans or animals.

5. Shanghai Lizhuo (SHLZ Pharma) production advantages and capacity: why choose us

in the category of rocuronium bromide intermediate LK-7, what customers are really screening is not “who has the spot”, but “who can control the impurity spectrum in steroid multi-step synthesis, keep the batch consistency, and step on the rhythm of ton delivery”. Shanghai Lizhuo has a verifiable accumulation in these three dimensions.

1. Steroid intermediates are the core track, not the part-time category.

Shanghai Lizhuo (SHLZ Pharma) has long focused on the development and production of steroid drug intermediates and fine chemicals. The LK-7 process chain involves the selective functionalization of the steroid skeleton, the introduction of morpholine and pyrrolidine rings, and the elimination of positional isomers and over-substituted by-products in multi-step purification-these steps require much higher reaction selectivity, crystallization control and impurity profile analysis than ordinary heterocyclic intermediates. Our process experience in steroid skeleton modification has allowed LK-7 batch-to-batch purity fluctuations and single impurity levels to be consistently controlled within the customer’s required release window.

2. Capacity allocation is based on “commercial-grade continuous supply”.

We have established flexible capacity arrangements for LK-7 and similar rocuronium intermediates from kg to ton, and regular batches can cover the complete life cycle from R & D amplification, registration batch to commercial procurement. The production line design takes into account the intermediate separation and purification requirements of multi-step synthesis, and has the supporting capabilities of low-temperature reaction, inert protection, precision temperature-controlled crystallization and dry packaging to avoid delivery fluctuations in the entire supply chain due to single-step capacity bottlenecks. For rocuronium API companies that need long-term fixed suppliers, Rizzo is positioned as a continuous, auditable and scalable upstream manufacturing partner, not a one-time trader.

3. The quality system is built around “downstream API release”.

LK-7 as a key intermediate of rocuronium bromide, the customer’s requirement is never “high enough”. Our quality control of this product covers key attributes such as relevant substance spectrum (including positional isomers, reduction by-products, intermediate states with incomplete amino substitution), residual solvent, loss on drying, particle size distribution and crystal type consistency, etc. The analysis method has been systematically verified and can cooperate with customers to complete method transfer and impurity spectrum comparison. For projects that need to declare or change suppliers, we provide complete technical package and batch record traceability support to reduce the compliance friction of customers in supply chain audit.

4. Customized response and delivery certainty

the customer demand for steroid intermediates is often not as simple as “placing an order in the standard catalog”-some customers need a specific crystal form, some need to adjust the packaging specifications to match the feeding amount, and some need to switch purity levels at different stages of the project. Lizhuo’s process development and production team has the ability to respond to projects from route fine-tuning, crystallization condition screening to customized packaging forms, and to base delivery commitments on transparent scheduling and raw material reserves, rather than relying on temporary transfers. For varieties such as rocuronium, where end demand is relatively predictable, this certainty of delivery is itself an integral part of supply chain resilience.

5. Compliance and the EHS Bottom Line

we manage production sites in accordance with the requirements of pharmaceutical intermediate manufacturing, with an EHS and quality management framework that is compatible with product exports and customer audits. Products can be shipped with COA, SDS and the necessary regulatory support documents to meet the customer’s information requirements in supplier access and annual audit.

Welcome to visit our official website https://www.shlzpharma.com/ , view the real-time product status, quality standards and contact information of LK-7(CAS 119302-20-4). If you are selecting long-term suppliers of steroid intermediates for the rocuronium bromide project, Shanghai Lizhuo is willing to become a link in your supply chain that does not need frequent replacement with process depth and capacity certainty.