Bridged to Fused Ring Interchange. Methodology for the Construction of Fused Cycloheptanes and Cyclooctanes. Total Syntheses of Ledol, Ledene, and Compressanolide
作者:S. L. Gwaltney、S. T. Sakata、K. J. Shea
DOI:10.1021/jo961005a
日期:1996.1.1
type two intramolecular Diels-Alder reaction (T2IMDA) is an efficient method for the formation of medium rings. The methodology is particularly effective for the construction of seven- and eight-memberedrings. A strategy for the synthesis of functionalized cycloheptanes and cyclooctanes has been developed that involves a bridged to fused ring interchange. The T2IMDA provides a synthesis for rigid
The type 2 intramolecular imino Diels-Alder reaction. Synthesis and structural characterization of bicyclo[n.3.1] bridgehead olefin/bridgehead lactams
作者:Timothy G. Lease、K. J. Shea
DOI:10.1021/ja00059a022
日期:1993.3
for the synthesis of a homologous series of bridgehead olefin-bridgehead lactams. The X-ray crystal structures of three members of this series, including the highly strained 2-carbomethoxy-8-oxo-2-azabicyclo[3.3.1]non-4-ene, were obtained. An analysis of the structural data permits evaluation of the response of the bridgehead double bond and bridgeheadamide linkages to similar torsional distorsions
2 型亚氨基 Diels-Alder 环加成反应用于合成同系列的桥头烯烃-桥头内酰胺。获得了该系列的三个成员的 X 射线晶体结构,包括高度应变的 2-carbomethoxy-8-oxo-2-azabicyclo[3.3.1]non-4-ene。对结构数据的分析允许评估桥头双键和桥头酰胺键对类似扭转变形的响应