Studies Towards a Concise Enantioselective Synthesis of Roseophilins
作者:Daniel J. Kerr、Bernard L. Flynn
DOI:10.1071/ch15407
日期:——
An oxazolidone auxiliary-controlled asymmetric Nazarov reaction has been applied to the synthesis of the cyclopentyl-fused pyrrole core of roseophilins. Additionally, a concise synthetic route to the pyrrole-furan biaryl fragment required in the synthesis of the recently isolated dechlororoseophilin is described. It is anticipated that these two syntheses can be combined in future efforts to provide
The first totalsynthesis of the antitumoragentroseophilin 1 is reported. Its intricate macrotricycliccore 2 is obtained by means of a new palladium-catalyzed manifold for the formation of ansa-bridged pyrroles which proceeds via vinyl oxirane 8 and allyl lactone 11 as key intermediates. After conversion of the latter into pyrrolophane 14, a base-induced elimination of the sulfone group followed