Short Syntheses of (±)-Grandisol and (±) Lineatin<i>via</i>, a common Intermediate
作者:Ivana Aljancic-Solaja、Max Rey、André S. Dreiding
DOI:10.1002/hlca.19870700510
日期:1987.8.12
6-step synthesis of (±)-grandisol (1) is presented, which involves dichloroketene addition to 3-methyl-3-butenyl acetate (4), reductive dechlorination of the adduct 6 to the ketone 7 and saponification to 8, aldolization of 7 or 8 with acetone and cyclization to the bicyclic ketone 9, Wolff-kishner, reduction to 14, and finally ring opening to 1. Since 9 is a known intermediate of the synthesis of (±)-lineatin
A Direct, Straightforward Conversion of Methoxymethyl Ethers into Acetates
作者:M. P. Bosch、I. Petschen、A. Guerrero
DOI:10.1055/s-2000-6258
日期:——
The direct transformation of MOM-protected alcohols into the corresponding acetates by acetic anhydride/ferric chloride in CH2Cl2, in a one-step process and good to excellent yields, is reported. The reaction has been applied to a variety of substrates and occurs with retention of configuration.
Diastereoselective and highly efficient radical approach to (1S,6R) and (1R,6S)-2,2,6-trimethyl-3-oxabicyclo[4.2.0]octadecane, key intermediates in the synthesis of (+) and (−)-grandisol
作者:Ramón Alibés、José L. Bourdelande、Josep Font
DOI:10.1016/s0040-4039(00)77178-4
日期:1994.4
The pure enantiomers (1S,6R) and (1R,6S)-2,2,6-trimethyl-3-oxabicyclo[4.2.0]octadecane, key intermediates in the synthesis of (+) and (−)-grandisol are prepared by a highly efficient radical deoxygenation under mild conditions of secondary hydroxyl groups.