tested in the microbial reduction of methyl-substituted bicyclo[3.2.0]hept-3-en-6-ones 1a-c. The endo-alcohols 2a-c were obtained with good yields and enantiomeric excess. Lower yields are described for the exo-alcohols 3a-c which are normally enantiomerically pure. Comparisons with microbial reduction of bicyclo[3.2.0]hept-2-en-6-one 1d and bicyclo[3.3.0]oct-7-en-2-one 1e are also reported.
Practical preparation of bicyclo[3.2.0]hept-3-en-6-ones and its utilisation in stereoselective total synthesis of grandisol and lineatin via a versatile intermediate.
devised for racemic grandisol and lineatin, two important components of pheromonic blends. They are based on the utilisation of 1,4-dimethylbicyclo[3.2.0]hept-3-en-6-one as a pivotal intermediate. This compound, as well as other bicyclo[3.2.0]hept-3-en-6-ones, are now easily available by a practical bicyclization of the corresponding 3-hydroxy-6-alkenoic acids.
performed on bicyclo[3.2.0]hept-3-en-6-ones and on bicyclo[3.2.0]hept-2-en-6-one. 3,3a,4,6a-Tetrahydro-2H-cyclopenta[b]furan-2-ones, important starting materials in the synthesis of linear condensed triquinane sesquiterpenes, have been prepared in an efficient manner by the easy bicyclization of 3-hydroxy-6-heptenoic acids, followed by a Baeyer-Villigeroxidation of the bicyclo[3.2.0]hept-3-en-6-one
A new, effective route to methyl substituted 3,3a,4,6a-tetrahydro-2H-cyclopenta[b]furan-2-ones
作者:Emanuela Marotta、Paolo Righi、Goffredo Rosini
DOI:10.1016/s0040-4039(00)76668-8
日期:1994.5
the synthesis of linear condensed triquinane sesquiterpenes, have been prepared in an efficient manner by an effective bicyclization of 3-hydroxy-6-heptenoic acids, followed by a Baeyer-Villigeroxidation of the bicyclo[3.2.0]hept-3-en-6-one intermediates.
3,3a,4,6a-四氢-2 H-环戊五[ b ]呋喃-2-酮1是合成线性缩合的三喹烷倍半萜烯的重要起始原料,是通过3-的有效双环化来有效制备的。羟基-6庚烯酸,然后双环[3.2.0] hept-3-en-6-one中间体的Baeyer-Villiger氧化。
The Conversion of 3-Hydroxy-6-heptenoic Acids into Bicyclo[3.2.0]hept-3-en-6-ones