Regioselective Synthesis of Trisubstituted 2,3-Dihydrofurans from Donor−Acceptor Cyclopropanes or from Reaction of the Corey Ylide with α-Sulfenyl-, α-Sulfinyl-, or α-Sulfonylenones
作者:Angela M. Bernard、Angelo Frongia、Pier P. Piras、Francesco Secci、Marco Spiga
DOI:10.1021/ol0514606
日期:2005.10.1
[reactions: see text] Regioselective synthesis of 2,4,5- or 3,4,5-trisubstituted 2,3-dihydrofurans has been realized by using donor-acceptor cyclopropanes or by a Corey ylide reaction with alpha-sulfenyl-, alpha-sulfinyl-, or alpha-sulfonylenones. The method allowed a straightforward synthesis of the natural product calyxolane B.
[反应:参见正文]通过使用供体-受体环丙烷或通过Corey ylide反应与α-亚磺酰基-,α的反应,实现了2,4,5-或3,4,5-三取代的2,3-二氢呋喃的区域选择性合成-亚磺酰基-或α-磺酰基烯酮。该方法可以直接合成天然产物花冠烷B。