中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (R,E)-methyl 4-(tert-butoxycarbonylamino)pent-2-enoate | 299181-99-0 | C11H19NO4 | 229.276 |
(2E,4s)-4-[[(1,1-二甲基乙氧基)羰基]氨基]-2-戊烯酸 | (S,E)-4-((tert-butoxycarbonyl)amino)pent-2-enoic acid | 142723-69-1 | C10H17NO4 | 215.249 |
—— | (2E,4S)-4-(tert-butoxycarbonylamino)-2-penten-1-ol | 104700-43-8 | C10H19NO3 | 201.266 |
2-甲基-2-丙基[(2S,3E)-5-氧代-3-戊烯-2-基]氨基甲酸酯 | tert-butyl [(2E)-1-methyl-4-oxobut-2-enyl]carbamate | 147317-32-6 | C10H17NO3 | 199.25 |
—— | (2S,3E,5Z)-2-(tert-butoxycarbonylamino)-3,5,13-tetradecatriene | 151239-25-7 | C19H33NO2 | 307.477 |
Trifluoroacetic acid (TFA) was found to promote intramolecular formal N-H insertion reactions. Upon treatment with TFA, optically pure N-Boc-β'-amino-α-diazoketones (5a-c) and N-Boc-γ'-amino-α-diazoketones (10a-d) can be converted, with retention of chirality, into pyrrolidinones (11a-c) and piperidinones (12a-d), respectively, with concomitant removal of the Boc group, in good to excellent yields.Key words: α-diazoketone, amino acid, pyrrolidinone, piperidinone, N-H insertion.