[EN] PROCESS FOR PREPARATION OF PHENOLIC MONOESTERS OF HYDROXYMETHYL PHENOLS [FR] PROCÉDÉ DE PRÉPARATION DE MONOESTERS PHÉNOLIQUES D'HYDROXYMÉTHYLPHÉNOLS
PROCESS FOR PREPARATION OF PHENOLIC MONOESTERS OF HYDROXYMETHYL PHENOLS
申请人:DESAI Sanjay Jagdish
公开号:US20110282094A1
公开(公告)日:2011-11-17
A process for the preparation of phenolic monoesters of 2-(3-diisopropylamino-1-phenylpropyl)-4-(hydroxymethyl)phenol by converting (±)6-halo-4-phenylchroman-2-one to (±)4-halo-2-(3-hydroxy-1-phenylpropyl)phenol. The two hydroxyl groups are protected and the protected compound is reacted with diisopropylamine to give (±)[3-(2-benzyloxy-5-halophenyl)-3-phenylpropyl]diisopropylamine. The halo substituent on the benzene ring is converted to corresponding benzyl alcohol and then the protection is removed to give racemic 5-HMT. Racemic 5-HMT is converted R enantiomer and then it is esterified.
With a goal of the total synthesis of polymaxenolide, the first hybrid marine natural product, the model studies for constructing the dihydropyran portion based on the originally proposed biosynthesis (C-C bond formation followed by dehydrative cyclization) and the synthesis of the lower portion (the C1-C3, C7-C17 portion) based on an iodide-induced Morita-Baylis-Hillman type reaction (a three-component assembly) followed by Suzuki-Miyaura cross-coupling are described. (C) 2014 Elsevier Ltd. All rights reserved.
[EN] PROCESS FOR PREPARATION OF PHENOLIC MONOESTERS OF HYDROXYMETHYL PHENOLS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE MONOESTERS PHÉNOLIQUES D'HYDROXYMÉTHYLPHÉNOLS