The synthesis of methyl 2-(benzyloxycarbonyl)amino-3-dimethylaminopropenoate. The synthesis of trisubstituted pyrroles, 3-amino-2<i>H</i>-pyran-2-ones, fused 2<i>H</i>-pyran-2-ones and 4<i>H</i>-pyridin-4-ones
作者:Renata Toplak、Jurij Svete、Branko Stanovnik、Simona GoliČ Grdadolnik
DOI:10.1002/jhet.5570360135
日期:1999.1
Methyl 2-(benzyloxycarbonyl)aimno-3-dimemylaminopropenoate (2) was prepared from methyl N-(benzyloxycarbonyl)glycinate (1) and t-butoxybis(dimethylamino)methane, and used as a reagent for preparation of substituted 3-(benzyloxycarbonyl)amino-4H-quinolizin-4-ones 5 and 6, −2H-pyran-2-ones 17–19, −2H-1-benzopyran-2-ones 28–31, and -naphthopyrans 32–35, −2H-pyrano[3,2-c]pyridine-2,5-dione 46, -pyrano-[4
由N-(苄氧基羰基)甘氨酸甲酯(1)和叔丁氧基双(二甲基氨基)甲烷制得2-(苄氧基羰基)亚氨基-3-二甲基氨基丙酸甲酯(2),并用作制备取代的3-(苄氧基羰基)的试剂。氨基-4- ħ喹嗪-4-酮5和6,-2 ħ吡喃-2-酮17-19,-2 ħ -1-苯并吡喃-2-酮28-31,和-naphthopyrans 32-35, - 2 H-吡喃并[3,2 - c ]吡啶-2,5-二酮46,-吡喃并- [4,3 - b ]吡喃-2,5-二酮47,-pyrano [3,2 - c ]苯并吡喃-2,5-二酮48,-pyrano [2,3 - c ] pyrazol -6-ones 49和50,-pyrano [2,3 - d ] pyrirnidin-7 -酮51层52的衍生物。在2与1,3-二酮的反应中,形成了三取代的吡咯14-16。选择性除去苄氧羰基的由猫alytic转移氢化用Pd / C在环己烯