Synthesis, crystal and molecular structure and dynamic behaviour of new dimethyldioxanedione based inherently dissymmetric overcrowded alkenes.

被引：7

作者：

Huck, NPM ^{[1
]}

Meetsma, A ^{[1
]}

Zijlstra, R ^{[1
]}

Feringa, BL ^{[1
]}

机构：

[1] UNIV GRONINGEN,GRONINGEN CTR CATALYSIS & SYNTH,DEPT ORGAN & MOLEC INORGAN CHEM,9747 AG GRONINGEN,NETHERLANDS

来源：

TETRAHEDRON LETTERS | 1995年 / 36卷 / 51期

关键词：

D O I：

10.1016/0040-4039(95)01991-P

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Two representatives of new chiral sterically overcrowded ethylenes, 2-methyl(9-thioxanthylidene)-2,2-dimethyl- 1,3-dioxane-4,6-dione (3) and 12H-benzo[a]thioxanthylidene-2,2-dimethyl-1,3-dioxane-4,6-dione (5), have been prepared and dynamic H-1 NMR studies revealed 1 racemization barriers of 10.3 kcal mol(-1) (S) and 23.2 kcal mol(-1) (5).

引用

页码：9381 / 9384

页数：4

共 20 条

[1] STERIC EFFECTS IN FAST THERMAL-Z, E-ISOMERIZATION OF OVERCROWDED ETHYLENES - CONFORMATIONAL BEHAVIOR OF N,N'-DIMETHYLBIACRIDANS [J].