Valenzisomerisierung voncis-Dienonen I. 2-Vinyl-3,4,5,6-tetrahydrobenzaldehyd; Pyrolyse. von 6-Oxabicyclo [3,1,0] hex-2-en [1]
作者:P. Schiess、H. L. Chia
DOI:10.1002/hlca.19700530305
日期:——
The synthesis of 2-vinyl-3,4,5,6-tetrahydrobenzaldehyde (10) is described. This compound equilibrates above 70° with its valence isomer 4,5-tetramethylene-2H-pyran (11) as can be shown by cis-trans-isomerization of the double bond in selectively deuterated 10. The unstable 2H-pyran 11 can be trapped as tetracyanoethylene adduct 12.
描述了2-乙烯基-3,4,5,6-四氢苯甲醛(10)的合成。该化合物达到平衡以上70°以其价键异构体4,5-四亚甲基-2- ħ吡喃(11),其可通过以下示出的顺式-反式中选择性地双键的-isomerization氘化10。不稳定的2 H-吡喃11可以作为四氰基乙烯加合物12捕获。