Reissert-type reaction of N-sulfonyl- or N-acyl-phthalazinium salts with trimethyl phosphite and crystal structure of dimethyl 2-mesyl-1,2-dihydro-1-phthalazinylphosphonate.
摘要:
通过酞嗪与磺酰氯或酰基氯和亚磷酸三甲酯的反应,合成了 2-磺酰基和 2-酰基-1,2-二氢-1-酞嗪基膦酸二甲酯(1a-e)。通过 X 射线分析确定了 1a 的晶体结构。
1H, 13C, and 31P NMRspectra of the products from the Reissert type reactions using acyl halides and trimethyl phosphite were measured and correlated with their structures. 31P Chemical shift of dimethoxyphosphinyl group and 13C chemical shift of the α-carbon atom, as well as 1JCP and 2JPH, can be criteria to differentiate the 1,2- and the 1,4-adducts from each other. Thus, there NMR parameters can be