Synthesis of various model compounds for the conjugated heterocyclic ring system of antibiotic roseophilin
摘要:
The title synthesis was accomplished starting with 3-chloro-2-formylpyrrole. The synthetic scheme featured one-pot preparation of the 4-methoxy-2-(pyrrol-2-yl)furan from the 2-acetoacetyl-pyrrole and coupling reactions of the C-5-position of the 4-methoxy-2-(pyrrol-2-yl)furan with various types of aldehydes and ketones as key steps.
The title synthesis was accomplished starting with 3-chloro-2-formylpyrrole. The synthetic scheme featured one-pot preparation of the 4-methoxy-2-(pyrrol-2-yl)furan from the 2-acetoacetyl-pyrrole and coupling reactions of the C-5-position of the 4-methoxy-2-(pyrrol-2-yl)furan with various types of aldehydes and ketones as key steps.
Total Synthesis of Roseophilin
作者:Alois Fürstner、Holger Weintritt
DOI:10.1021/ja973846k
日期:1998.4.1
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