中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (1S*,4R*,5R*,6S*,10S*)-5-(2-benzyloxyethyl)-1,4,5,10-tetramethylbicyclo[4.4.0]dec-8-en-2-one | —— | C23H32O2 | 340.506 |
—— | (1S*,4R*,5R*,6S*,10S*)-5-(2-benzyloxyethyl)-1-(1-hydroxymethyl)-4,5,10-trimethylbicyclo[4.4.0]dec-8-en-2-one | —— | C23H32O3 | 356.505 |
—— | 3-Methyl-6-oxo-3-(2-phenylmethoxyethyl)cyclohexa-1,4-diene-1-carbonitrile | 356046-20-3 | C17H17NO2 | 267.327 |
A general synthetic approach to diterpenoids of the cis-clerodane family has been developed, leading to the first total synthesis, in racemic form, of 2-oxo-5α,8α-13,14,15,16-tetranorclerod-3-en-12-oic acid (2). The key operation involved is the face-selective Diels–Alder reaction of dienone ester 10 with trans-piperylene, giving rise to adduct 11 containing the decalin nucleus and correct stereogenic centers common to many cis-clerodane diterpenoids. Keywords: cis-clerodanes, general synthetic approach, total synthesis, face-selective Diels–Alder reaction.