羰基-烯烃光环加成反应的自旋导向立体选择性
Spin-directed stereoselectivity of carbonyl-alkene photocycloadditions.
作者信息
Griesbeck AG, Fiege M, Bondock S, Gudipati MS
机构信息
Institute of Organic Chemistry, Greinstrasse 4, and Institute of Physical Chemistry, Luxemburger Strasse 116, University of Cologne, D-50939 Koln, Germany.
出版信息
Org Lett. 2000 Nov 16;2(23):3623-5. doi: 10.1021/ol006502z.
The concentration dependence of the Paterno-Buchi photocycloaddition of the two cyclic enolethers 2,3-dihydrofuran and 2,3-dihydropyran, respectively, with aromatic as well as aliphatic aldehydes was studied. For aliphatic aldehydes, a sharp transition from low to high diastereostereoselectivity was observed, indicating a switch from singlet to triplet photocycloaddition with different selectivity controlling mechanisms.
分别研究了两种环状烯醚2,3-二氢呋喃和2,3-二氢吡喃与芳香醛以及脂肪醛的帕特诺-布齐光环加成反应的浓度依赖性。对于脂肪醛，观察到从低非对映选择性到高非对映选择性的急剧转变，这表明从单线态到三线态光环加成反应发生了转变，且具有不同的选择性控制机制。
Zotero 插件