中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (3-diazo-1-methyl-2-oxo-butyl)-carbamic acid tert-butyl ester | 289493-15-8 | C10H17N3O3 | 227.263 |
2-甲基-2-丙基[(2S)-3-氧代-2-丁烷基]氨基甲酸酯 | tert-butyl N-[(1S)-1-methyl-2-oxo-propyl]carbamate | 126027-07-4 | C9H17NO3 | 187.239 |
—— | 1-bromo-3(S)-tert-butyloxycarbonylamino-2-oxobutane | 170876-69-4 | C9H16BrNO3 | 266.135 |
(S)-3-(boc-氨基)-1-氯-2-丁酮 | Boc-Ala-chloromethyl ketone | 93371-30-3 | C9H16ClNO3 | 221.684 |
—— | tert-butyl (4-chloro-3-oxobutan-2-yl)carbamate | 1564575-82-1 | C9H16ClNO3 | 221.684 |
—— | tert-butyl (S)-2-methyl-3-oxoazetidine-1-carboxylate | 171919-76-9 | C9H15NO3 | 185.223 |
—— | tert-butyl (1S)-1-methyl-4-diazo-3-oxobutylcarbamate | 207924-86-5 | C10H17N3O3 | 227.263 |
—— | tert-butyl N-[(1S)-1-methyl-3-oxopropyl]carbamate | 118173-26-5 | C9H17NO3 | 187.239 |
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.