Synthesis of 4-Substituted Chlorophthalazines, Dihydrobenzoazepinediones, 2-Pyrazolylbenzoic Acid, and 2-Pyrazolylbenzohydrazide via 3-Substituted 3-Hydroxyisoindolin-1-ones
作者:Hanh Nho Nguyen、Victor J. Cee、Holly L. Deak、Bingfan Du、Kathleen Panter Faber、Hakan Gunaydin、Brian L. Hodous、Steven L. Hollis、Paul H. Krolikowski、Philip R. Olivieri、Vinod F. Patel、Karina Romero、Laurie B. Schenkel、Stephanie D. Geuns-Meyer
DOI:10.1021/jo3000628
日期:2012.4.20
hydrazine, followed by chlorination with POCl3. We have also discovered two novel transformations of 3-vinyl- and 3-alkynyl-3-hydroxyisoindolinones. Addition of vinyl organometallic reagents to N,N-dimethylaminophthalimide (8a) provided dihydrobenzoazepinediones 15a–15c via the proposed ring expansion of 3-vinyl-3-hydroxyisoindolinone intermediates. 3-Alkynyl-3-hydroxyisoindolinones react with hydrazine and
在本文中,我们描述了以良好的总收率进行的4-取代的氯邻苯二甲腈的一般三步合成。在关键步骤中,N,N-二甲基氨基邻苯二甲酰亚胺(8a)指导烷基,芳基和杂芳基有机金属试剂的选择性单加成反应,得到3-取代的3-羟基异吲哚满酮9b,9i - 9am。通过与肼反应,然后用POCl 3氯化,许多羟基异吲哚啉酮可转化为氯酞嗪1b - 1v。我们还发现了3-乙烯基和3-炔基-3-羟基异吲哚满酮的两个新颖的转化。将乙烯基有机金属试剂添加到N,N-二甲基氨基邻苯二甲酰亚胺(8a)通过提议的3-乙烯基-3-羟基异吲哚满酮中间体的扩环作用提供了二氢苯并氮杂氮杂二酮15a - 15c。3-炔基-3-羟基异吲哚啉酮与肼和取代的肼反应,生成2-吡唑基苯甲酸16a - 16d和2-吡唑基苯并酰肼17a - 17g,而不是预期的炔基酞菁。