Synthesis of 3-Amino-6-dimethylamino-4-oxopyrazolo[3,4-<i>d</i>] [1,3]oxazine Derivatives
作者:Richard Neidlein、Zhihua Sui
DOI:10.1055/s-1991-26538
日期:——
3-Amino-1-aryl-6-dimethylamino-4-oxo-1,4-dihydropyrazolo[3,4-d][1,3] oxazines 4a-7a and 3-amino-2-aryl-6-dimethylamino-4-oxo-2,4-dihydropyrazolo [3,4-d][1,3]oxazines 4b-6b were synthesized from 4-chloro-5-cyano-2-dimethylamino-6-oxo-6H-1,3-oxazine 2 and arylhydrazines in good yields. The substituent effect of the arylhydrazines on the yields of products was clearly observed.
3-氨基-1-芳基-6-二甲氨基-4-氧-1,4-二氢吡唑并[3,4-d][1,3]氧氮杂环庚烷 4a-7a 及 3-氨基-2-芳基-6-二甲氨基-4-氧-2,4-二氢吡唑并[3,4-d][1,3]氧氮杂环庚烷 4b-6b 从 4-氯-5-腈基-2-二甲氨基-6-氧-6H-1,3-氧氮杂环庚烷 2 与芳基酰肼中以良好产率合成得到。可明显观察到芳基酰肼的取代基效应对产物产率的影响。