Potassium Carbonate → Colestolone

HRID 1199314ノート

反応式

HRID 1199314 の反応式
C([O:9][C@H:10]1[CH2:34][CH2:33][C@@:32]2([CH3:35])[C@@H:12]([CH2:13][CH2:14][C:15]3[C@@H:31]2[CH2:30][CH2:29][C@@:28]2([CH3:36])[C:16]=3[C:17](=[O:37])[CH2:18][C@@H:19]2[C@H:20]([CH3:27])[CH2:21][CH2:22][CH2:23][CH:24]([CH3:26])[CH3:25])[CH2:11]1)(=O)C1C=CC=CC=1.C(=O)([O-])[O-].[K+].[K+]>CO>[OH:9][C@H:10]1[CH2:34][CH2:33][C@@:32]2([CH3:35])[C@@H:12]([CH2:13][CH2:14][C:15]3[C@@H:31]2[CH2:30][CH2:29][C@@:28]2([CH3:36])[C:16]=3[C:17](=[O:37])[CH2:18][C@@H:19]2[C@H:20]([CH3:27])[CH2:21][CH2:22][CH2:23][CH:24]([CH3:26])[CH3:25])[CH2:11]1

参加物

4

反応物 2

HCID 11430Potassium CarbonateHCID 11249146HCID 11249146、化合物

生成物 1

HCID 10046567Colestolone

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

In accordance with Scheme III, the epoxidation of (3β,5α)cholesta-7,14-dien-3-ol benzoate (2) to (3β,5α, 15α)-14,15-epoxycholest-7-en-3-ol benzoate (3) is carried out as described in Scheme II. Also when the epoxyolefin (3) is treated with a catalytic amount of a protic acid (preferably 70% perchloric acid) in acetone at a controlled temperature of about 23°-26° C. for 3 hours, the precursor compound (3β,5α)-3-(benzoyloxy)cholest-8(14)en-15-one (6) is obtained. However, it has been discovered that when the preceding reaction is conducted at a temperature of from about 15°-22° C. for 3 hours, the novel intermediate compound (3β,5α)-3-(benzoyloxy)cholest-7-en-15-one (5) is produced Further treatment of (5) with a protic acid (preferably 70% perchloric acid) in acetone at about 23°-26° C. for 2 hours also gives the precursor compound (6) which is refluxed with potassium carbonate in a protic solvent, preferably methanol, as described hereinbefore in Scheme II to give the product (7). The alternate debenzoylation procedures described in Scheme II may also be used to give the product (7).

出典と根拠

ORDレコード
ord-c459327ec2324850963e79c818e6c201
出典データセット
uspto-grants-1990_02
特許番号
US04900477

反応ノート

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