Henseke; Patzwaldt, Chemische Berichte, 1956, vol. 89, p. 2904,2908
作者:Henseke、Patzwaldt
DOI:——
日期:——
The first microwave-assisted regiospecific synthesis of 6-substituted pterins
作者:Shyamaprosad Goswami、Avijit Kumar Adak
DOI:10.1016/s0040-4039(02)02007-5
日期:2002.11
The pyrazine ring was developed in a pyrimidine and in a benzene by Isay type condensations under microwave irradiation to afford pterin and quinoxaline systems. Interestingly, the desired isomerically free 6-substituted pterins including pterin sugar derivatives were synthesised in moderate to good yields whereas mixtures of both 6- and 7-isomers (major) are generally obtained using conventional Isay