Preparation of the 1,2-alkylenedioxy-benzofuroxans 4e,f, 5a-c,e,f, and nitrobenzofuroxans 1a-c,e,f, 2a-c,e,f, 3b,c is described. The nitrobenzofuroxans 1b-e isomerize thermally to 2b-e, whereas 2a isomerizes to 1a. A thermostationary state is obtained from 1f or 2f (1f:2f = 44:56). The role of the heterocyclic alkylenedioxy ring is discussed.
描述了1,2-亚烷基二氧基-
苯并呋喃聚糖4e,f,5a-c,e,f和硝基
苯并呋喃1a-c,e,f,2a-c,e,f,3b,c的制备。硝基
苯并呋喃类化合物1b-e热异构化为2b-e,而2a异构化为1a。从1f或2f(1f:2f = 44:56)获得热稳态。讨论了杂环亚烷基二氧基环的作用。