SYNTHESIS, CRYSTAL AND MOLECULAR-STRUCTURE AND DYNAMIC BEHAVIOR OF NEW DIMETHYLDIOXANEDIONE BASED INHERENTLY DISSYMMETRIC OVERCROWDED ALKENES

Authors
HUCK NPM MEETSMA A ZIJLSTRA R FERINGA BL
Citation
Npm. Huck et al., SYNTHESIS, CRYSTAL AND MOLECULAR-STRUCTURE AND DYNAMIC BEHAVIOR OF NEW DIMETHYLDIOXANEDIONE BASED INHERENTLY DISSYMMETRIC OVERCROWDED ALKENES, Tetrahedron letters, 36(51), 1995, pp. 9381-9384
Citations number
20
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
36
Issue
51
Year of publication
1995
Pages
9381 - 9384
Database
ISI
SICI code
0040-4039(1995)36:51<9381:SCAMAD>2.0.ZU;2-6
Abstract
Two representatives of new chiral sterically overcrowded ethylenes, 2- methyl(9-thioxanthylidene)-2,2-dimethyl- 1,3-dioxane-4,6-dione (3) and hioxanthylidene-2,2-dimethyl-1,3-dioxane-4,6-dione (5), have been pre pared and dynamic H-1 NMR studies revealed 1 racemization barriers of 10.3 kcal mol(-1) (S) and 23.2 kcal mol(-1) (5).