作者:Francesco Chioccara、Ernesto Ponsiglione、Giuseppe Prota、Ronald H. Thomson
DOI:10.1016/0040-4020(76)80100-7
日期:——
- phenyl - 2H - 1,4-benzoxazine 8 gives 2 - hydroxy -3 - phenyl - 2H - 1,4-benzoxazine 13, 3 - phenyl - 2H - 1,4-benzoxazin - 2 - one 11, and 2 - phenylbenzoxazole 10 according to the conditions. Oxidation of 8 with DDQ in the presence of air gave mainly the bisacetal 17 but in the absence of air the major product was trans-Δ2,2′-bi-(3-phenyl-2H-1,4-benzoxazine) 21a. Corresponding dimers were obtained
苯基- - 2H - 3的自氧化1,4-苯并恶嗪8给出2 -羟基-3 -苯基- 2H - 1,4-苯并恶嗪13,3 -苯基- 2H - 1,4-苯并恶嗪- 2 -一个11,和根据条件2-苯基苯并恶唑10。的氧化8用DDQ在空气的存在下,得到主要是bisacetal 17,但在不存在空气的主要产物是反式-Δ 2,2' -bi-(3-苯基-2H-1,4-苯并恶嗪)21A。从3-对-溴苯基苯并恶嗪9获得了相应的二聚体。该反式异构体21A和22A是光致变色的,在溶液中暴露于直射阳光下会变成顺式异构体。