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Processes for preparation of (s)-tert-butyl 4,5-diamino-5-oxopentanoate

A technology, the technology of amino protecting group, is applied in the technical field of preparing (S)-4,5-diamino-5-oxopentanoic acid tert-butyl ester, which can solve the problem that the chiral purity analysis data is not well understood issues such as definition

Pending Publication Date: 2020-04-17
CELGENE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Analytical data for chiral purity are often poorly defined

Method used

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  • Processes for preparation of (s)-tert-butyl 4,5-diamino-5-oxopentanoate
  • Processes for preparation of (s)-tert-butyl 4,5-diamino-5-oxopentanoate
  • Processes for preparation of (s)-tert-butyl 4,5-diamino-5-oxopentanoate

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Experimental program
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Embodiment approach

[0636]

[0637] In one embodiment, there is also provided herein a process for the preparation of a compound of formula (XV) or a salt, solvate, hydrate, enantiomer, mixture of enantiomers or isotopologues thereof comprising 2-chloro-6-hydroxyl Carboxymetallation of benzaldehyde (eg, Pd / CO / MeOH). One embodiment of this method is described in the following scheme:

[0638]

[0639] or related variants (using amines instead of alcohols ROH to form amides)

[0640] 5.2.8 Preparation of O-t-Bu-DIC isourea

[0641] In one embodiment, provided herein is a process for the preparation of O-t-Bu-DIC isourea of ​​the following structure:

[0642]

[0643] The process involves reacting diisopropylcarbodiimide (DIC) with t-butanol and Cu(I) salt in the presence of oxygen.

[0644] In one embodiment, oxygen is present in an amount up to about 22% of the atmosphere. In one embodiment, oxygen is present in an amount from about 1% to about 10% of the atmosphere. In one embodimen...

Embodiment 1

[0746]

[0747] Step 1: Synthesis of compound 3

[0748] Add water 60ml to L-glutamic acid (2, 10g, 68.0mmol). To the resulting suspension was slowly added benzyl chloroformate (CbzCl, 9.16ml, 63.9mmol). Simultaneously 2N NaOH (60 mL) was added to maintain the pH at 10-12. The rate of addition was adjusted to maintain a batch temperature of 0-5 °C. After addition of CbzCl, the mixture was stirred at 5°C for 1 hour and then at 20 to 25°C for a further 16 hours. The mixture was then washed with EtOAc. The aqueous product-containing layer was acidified to pH = 2-3 by addition of cone. HCl, then extracted into EtOAc. The organic layer was washed with Na 2 SO 4 Dry and concentrate under reduced pressure. The resulting solid was dried overnight in a 35-40 °C oven to yield 16 g of compound 3 (84%). LC-MS: Calcd. m / e(M+1), 282.1; Found: 282.2. 1 H NMR (DMSO-d 6 ,): δ (ppm) = 1.68-1.83 (m, 1H), 1.91-2.03 (m, 1H), 2.27-2.35 (m, 2H), 3.99-4.22 (m, 1H), 5.03 (s, 2H) , 7.29-7...

Embodiment 2

[0759]

[0760] Example 2 differs from Example 1 in the choice of amine nucleophile used to open the lactone. In Example 2 ammonia was used directly, whereas in Example 1 a protected amine was used.

[0761] Step 3: Synthesis of compound 7

[0762] To a solution of compound 4 (1.1 g, 3.75 mmol) in methanol (20 ml) was added ammonium hydroxide (20-30 wt%, 10 ml, 20 equiv) at 20 to 25°C. The mixture was stirred at 20-25°C for 5 days. The mixture was concentrated under reduced pressure to remove methanol. The resulting oil was dissolved in water. The mixture was washed with EtOAc, then the aqueous layer was acidified with 35% HCl to pH = 2-3. The acidified mixture was extracted with EtOAc (20ml x 3). The organic layer was washed with MgSO 4 Dry and concentrate on a rotary evaporator. The resulting solid was dried in an oven under vacuum to afford compound 7. LC-MS m / e calcd. 281.1 (M+1); found 281.2. 1 H NMR (DMSO-d 6 ,): δ (ppm) 1.65-1.78 (m, 1H), 1.82-1.95 (m, 1H),...

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Abstract

Provided are processes for the preparation of (S)-tert-butyl 4,5-diamino-5-oxopentanoate, or a salt, solvate, hydrate, enantiomer, mixture of enantiomers, or isotopologue thereof. Also provided are solid forms of various intermediates and products obtained from the processes.

Description

[0001] This application claims priority to U.S. Provisional Application No. 62 / 548,268, filed August 21, 2017, which is hereby incorporated by reference in its entirety. [0002] 1. Technical field [0003] Provided herein are processes for the preparation of (S)-tert-butyl 4,5-diamino-5-oxopentanoate or a salt, solvate, hydrate, enantiomer, mixture of enantiomers or isotopologues thereof. The compounds are useful in the preparation of pharmaceutically active compounds containing (S)-2-aminoglutarimide moieties, such as (S)-3-(4-((4-(morpholinomethyl)benzyl)oxy base)-1-oxoisoindolin-2-yl)piperidine-2,6-dione. [0004] 2. Background technology [0005] Certain compounds containing glutarimide moieties have been reported to display pharmaceutical properties suitable for clinical development. An example is (S)-3-(4-((4-(morpholinomethyl)benzyl)oxy)-1-oxoisoindolin-2-yl)piperidine-2,6- diketone. This compound is described in US Patent Publication No. 2011 / 0196150, which is inco...

Claims

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Application Information

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IPC IPC(8): C07D209/46C07C275/70C07C69/88C07C237/06
CPCC07C67/313C07C273/1809C07C275/24C07C275/70C07C231/12C07C237/06C07C237/12C07D209/46Y02P20/55C07C69/84C07C275/06C07C231/02C07C231/18
Inventor 约翰·F·特拉弗斯迈克尔·J·扎库托张魏红柯尔斯顿·法耶·约翰逊玛丽尔·E·吉赫蒂克里斯多佛·马顿
Owner CELGENE CORP
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