New Annulations via Platinum-Catalyzed Enyne Cyclization and Cyclopropane Cleavage
作者:Cristina Nevado、Catalina Ferrer、Antonio M. Echavarren
DOI:10.1021/ol0486573
日期:2004.9.1
[reaction: see text] Oxidative ring opening of 3-oxabicyclo[4.1.0]hept-4-enes, formed by the intramolecular Pt(II)-catalyzed cyclopropanation of enol ethers by alkynes, gives oxepane derivatives. Alternatively, the acid-catalyzed opening of the cyclopropane ring leads to dihydrobenzofurans or 3,4-dihydro-2H-chromenes.
[反应:参见正文] 3-氧杂双环[4.1.0]庚-4-烯的氧化开环反应是由炔烃通过分子内Pt(II)催化的烯醇醚的环丙烷化反应而形成的,即环氧丙烷衍生物。可选择地,环丙烷环的酸催化的开口导致二氢苯并呋喃或3,4-二氢-2H-色烯。