Tert-butoxycarbonylalanine → (S)-2-tert-Butoxycarbonylaminopropionic acid (RS)-1-[4-((8S,11R,13S,-14S,17S)-17-hydroxy-13-methyl-3-oxo-17-pentafluoroethyl-2,3,6,7,8,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-11-yl)phenyl]ethyl ester

HRID 511045Notes

Reaction equation

HRID 511045 reaction equation
[OH:1][C@:2]1([C:30]([F:36])([F:35])[C:31]([F:34])([F:33])[F:32])[C@:18]2([CH3:19])[C@H:5]([C@H:6]3[C:15]([C@@H:16]([C:20]4[CH:25]=[CH:24][C:23]([CH:26]([OH:28])[CH3:27])=[CH:22][CH:21]=4)[CH2:17]2)=[C:14]2[C:9](=[CH:10][C:11](=[O:29])[CH2:12][CH2:13]2)[CH2:8][CH2:7]3)[CH2:4][CH2:3]1.[C:37]([O:41][C:42]([NH:44][C@@H:45]([CH3:49])[C:46](O)=[O:47])=[O:43])([CH3:40])([CH3:39])[CH3:38]>>[OH:1][C@:2]1([C:30]([F:35])([F:36])[C:31]([F:32])([F:33])[F:34])[C@:18]2([CH3:19])[C@H:5]([C@H:6]3[C:15]([C@@H:16]([C:20]4[CH:21]=[CH:22][C:23]([CH:26]([O:28][C:46](=[O:47])[C@@H:45]([NH:44][C:42]([O:41][C:37]([CH3:40])([CH3:39])[CH3:38])=[O:43])[CH3:49])[CH3:27])=[CH:24][CH:25]=4)[CH2:17]2)=[C:14]2[C:9](=[CH:10][C:11](=[O:29])[CH2:12][CH2:13]2)[CH2:8][CH2:7]3)[CH2:4][CH2:3]1

Participants

3

Reactant 2

HCID 85082Tert-butoxycarbonylalanineHCID 18346565(8S,11R,13S,14S,17S)-17-hydroxy-11-[4-((RS)-1-hydroxyethyl)phenyl]-1 3-methyl-17-pentafluoroethyl-1,2,6,7,8,11,12,13,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one

Product 1

HCID 86670520(S)-2-tert-Butoxycarbonylaminopropionic acid (RS)-1-[4-((8S,11R,13S,-14S,17S)-17-hydroxy-13-methyl-3-oxo-17-pentafluoroethyl-2,3,6,7,8,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-11-yl)phenyl]ethyl esterYield 73%

Procedure

In analogy to Example 5, 300 mg (0.59 mmol) of (8S,11R,13S,14S,17S)-17-hydroxy-11-[4-((RS)-1-hydroxyethyl)phenyl]-1 3-methyl-17-pentafluoroethyl-1,2,6,7,8,11,12,13,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one were converted using (S)-2-tert-butoxycarbonylaminopropionic acid and, after workup and purification, 294 mg (73%) of the title compounds were isolated as a colourless foam.

Workup

  1. customafter workup and purification

Sources & evidence

ORD record
ord-a34a9cf8063348ca9eef7d651db15790
Source dataset
uspto-grants-2015_08
Patent number
US09096639B2

Reaction notes

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