The preparation and electrocyclic ring-opening of cyclobutenes: Stereocontrolled approaches to substituted conjugated dienes and trienes
作者:Falmai Binns、Roy Hayes、Kevin J. Hodgetts、Suthiweth T. Saengchantara、Timothy W. Wallace、Christopher J. Wallis
DOI:10.1016/0040-4020(96)00039-7
日期:1996.3
Thermal electrocyclic ring-opening of 4-alkyl-2-cyclobutene-1-carbaldehydes occurs at low temperature to give (2Z,4E)-alkadienals exclusively, and the process is exploited in transforming cis-3-cyclobutene-1,2-dimethanol 1 into a variety of naturally occurring 1,3,5-alkatrienes and 2,4-decadienoates. Desymmetrisation of 1 with Pseudomonas fluorescens lipase gives access to both enantiomers of 3-oxabicyclo[3
4-烷基-2-环丁烯-1-碳醛在低温下发生热电开环,仅生成(2 Z,4 E)-链二烯醛,该方法用于顺式-3-环丁烯-1,2的转化。-二甲醇1转化为各种天然存在的1,3,5-链烷烃和2,4-癸二烯酸酯。的去对称1与荧光假单胞菌的脂肪酶可以访问-3-氧杂二环[3.2.0]庚-6-烯-2-酮的两种对映体4,用于立体控制路由使用至6-含氧(2 Ž,4 ë)-alkadienals 。