第五章:不对称 Diels- Alder反应 引言 手性亲双烯体 手性双烯体 双不对称反应 手性催化剂 杂 Diels-Alder反应 分子内 Diels-Alder反应 逆 Diels-Ader
第五章：不对称Diels-Alder反应 •引言 •手性亲双烯体 •手性双烯体 •双不对称反应 •手性催化剂 •杂Diels-Alder反应 •分子内Diels-Alder反应 •逆Diels-Alder
1.引言 HOMO LUMO Orientation of substituents R Major R R R R R Minol
1. 引言 HOMO LUMO 1) Orientation of substituents R R' R' R R R' R' R Major Minor
e) Favorite property of substituents R-electron donating; R-electron withdrawing 3)Stereochemistry of substituents on alkene R R R CIS R R R R R R Trans R R R
2) Favorite property of substituents: R-electron donating; R'-electron withdrawing 3) Stereochemistry of substituents on alkene R R' R' R R R' R' R R' R R' R cis Trans
Stereochemistry of whole cycle additionl R R in front major behind R R R R in front behind minor
4) Stereochemistry of whole cycle addition R R' O R R' O major in front behind minor R R' O R R' O in front behind
R behind in front major R R behind in front minor
R R' O major R R' O behind in front R R' O minor R R' O behind in front