Ammonium Chloride → HCID 54439326, compound

HRID 1941175Notes

Reaction equation

HRID 1941175 reaction equation
[Si:1]([O:8][C@H:9]1[CH2:35][CH2:34][C@@:33]2([CH3:36])[C@@H:11]([CH2:12][CH2:13][C@@H:14]3[C@@H:32]2[C@@H:31]([O:37][Si:38]([CH3:41])([CH3:40])[CH3:39])[C@@H:30]([O:42]C(=O)C)[C@@:29]2([CH3:46])[C@H:15]3[CH2:16][C@@H:17]3[O:22][C@@:21]4([O:28][CH2:27][C@H:25]([CH3:26])[CH2:24][CH2:23]4)[C@@H:19]([CH3:20])[C@@H:18]32)[CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[H-].[Al+3].[Li+].[H-].[H-].[H-].[Cl-].[NH4+]>C1COCC1>[Si:1]([O:8][C@H:9]1[CH2:35][CH2:34][C@@:33]2([CH3:36])[C@@H:11]([CH2:12][CH2:13][C@@H:14]3[C@@H:32]2[C@@H:31]([O:37][Si:38]([CH3:39])([CH3:40])[CH3:41])[C@@H:30]([OH:42])[C@@:29]2([CH3:46])[C@H:15]3[CH2:16][C@@H:17]3[O:22][C@@:21]4([O:28][CH2:27][C@H:25]([CH3:26])[CH2:24][CH2:23]4)[C@@H:19]([CH3:20])[C@@H:18]32)[CH2:10]1)([C:4]([CH3:7])([CH3:5])[CH3:6])([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 25517Ammonium ChlorideHCID 21226445Aluminium lithium hydrideHCID 53652232HCID 53652232, compound

Product 1

HCID 54439326HCID 54439326, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

(3β,5α,11β,12β,25R)-3-(t-butyldimethylsilyloxy)-11-(trimethylsilyloxy)-12-acetoxyspirostane was deacetylated by treatment with lithium aluminum hydride in THF followed by catious addition aqueous ammonium chloride. The resulting title compound suffered 11 to 12 silyl group migration on silica gel, and thus had to used unpurified.

Sources & evidence

ORD record
ord-24dd1b6964cc4421aed684d6fef886c1
Source dataset
uspto-grants-1997_12
Patent number
US05703052

Reaction notes

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