2-Bis (dimethylamino)phosphinoyl-1-lithio-1, 2, 3, 4-tetrahydroisoquinoline. A highly nucleophilic d1-reagent for the preparation of 1-substituted tetrahydroisoquinolines
作者:Dieter Seebach、Masaaki Yoshifuji
DOI:10.1002/hlca.19810640305
日期:1981.4.29
reactions with electrophiles furnish the products 6–22, 26, 27, see Table 1 and the Scheme. A second alkylation is also possible, see 23–25. The cleavage to tetrahydroisoquinolines is accomplished in refluxing aqueous-methanolic hydrochloric acid, see Table 2. Phosphinoylation, lithiation, reaction with electrophiles and cleavage constitute an efficient sequence for 1-alkylation of the isoquinoline nucleus
标题化合物4由磷酸酰胺5在四氢呋喃中与丁基锂生成。锂试剂4在室温下稳定。其与亲电反应提供产品6-22,26,27,参见表1和方案。第二次烷基化也是可能的,请参阅23–25。在回流的含水甲醇盐酸中完成四氢异喹啉的裂解,参见表2。膦酰基化,锂化,与亲电试剂反应和裂解构成异喹啉核1烷基化的有效序列。