Synthesis and intramolecular photocycloadditions of 2-acyloxy-3-hexenoyl cyclohexenones: Diastereoselectivity in the intramolecular [2+2] photocycloadditions of alkenes and cyclohexenones tethered by four atoms
作者:Michael T. Crimmins、Bryan W. King、Paul S. Watson、Lisa E. Guise
DOI:10.1016/s0040-4020(97)90403-8
日期:1997.6
The intramolecular [2+2] photocycloaddition of 2-acyloxy-2-3-hexenoylcyclohexenones has been shown to be highly diastereoselective. The cycloadditions produce exclusively cis fused products and the sense and level of selectivity is consistent with a molecular mechanics model for initial bond formation in the stepwise cycloaddition.
已经显示2-酰氧基-2-3-己烯酰基环己烯酮的分子内[2 + 2]光环加成是高度非对映选择性的。环加成仅产生顺式稠合产物,选择性的意义和水平与逐步环加成中初始键形成的分子力学模型一致。