作者:T. Hudlicky、A. Fleming、T.C. Lovelace
DOI:10.1016/s0040-4020(01)80129-0
日期:1989.1
The resulting vinyloxiranes were transformed thermolytically to functionalized dihydrofurans. An operational comparison of this heterocyclic annulation is made with its carbocyclic counterpart, the [2+3] cyclopentene annulation, and the potential for a general dihydrofuran synthesis in either a racemic or an asymmetric fashion is addressed.
发现醛与2-溴巴豆酸乙酯(12)的二烯酸锂在低温下容易进行立体选择性乙烯基肟酸化。将所得的乙烯基氧杂环丁烷热解成官能化的二氢呋喃。对该杂环环状结构与其碳环对应物[2 + 3]环戊烯环状结构进行操作比较,并探讨了以消旋或不对称方式合成一般二氢呋喃的潜力。