HAYES, ROY;SCHOFIELD, JOSEPH M.;SMALLEY, ROBERT K.;SCOPES, DAVID I. C., TETRAHEDRON, 46,(1990) N, C. 2089-2096
作者:HAYES, ROY、SCHOFIELD, JOSEPH M.、SMALLEY, ROBERT K.、SCOPES, DAVID I. C.
DOI:——
日期:——
Photolytic ring-expansions of 6-azidoquinolines and 6-azidodiazines: some unexpected azepine ring-opening reactions
作者:Roy Hayes、Joseph M. Schofield、Robert K. Smalley、David I.C. Scopes
DOI:10.1016/s0040-4020(01)89775-1
日期:1990.1
Photolysis of 6-azidoquianazoline in MeOH-KOMe-dioxan yields 8,9-dihydro-5,7-dimethoxy-5H-pyrimido[5,4-]azepine (5) which on acid hydrolysis ring-opens to the pyrimidine-carbaldehyde (7). The mechanism of formation of this unexpected dimethoxypyrimido-azepine is discussed and related to previous similar results involving 6-azido-2,3-dihydrofuro- and 6-azido-23-dihydrothieno-[2,3-b]quinolines