中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2,6-二氯-7-甲基嘌呤 | 2,6-dichloro-7-methylpurine | 2273-93-0 | C6H4Cl2N4 | 203.031 |
2,6,8-三氯-7-甲基嘌呤 | 2,6,8-trichloro-7-methylpurine | 16404-16-3 | C6H3Cl3N4 | 237.476 |
A 1H n.m.r. study of some methoxy-, methylthio- and chloro-N-methyl-purines and imidazo[4,5-c]-pyridines revealed that the signal due to the N-methyl group when present in the six-membered ring occurred at lower field than when present in the imidazole ring. The methylation of 2-,6-and 8-methoxypurines with diazomethane, and metatheses of chloro-N-methylpurines each to methoxy-N-methylpurines are described.