中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | methyl 5-oxo-4-(phenylcarbonyl)-2-[N-(9-phenylfluoren-9-yl)amino]hexanoate | —— | C33H29NO4 | 503.598 |
—— | methyl 5-oxo-4-(methyloxycarbonyl)-2-[N-(9-phenylfluoren-9-yl)amino]hexanoate | 296774-83-9 | C28H27NO5 | 457.526 |
—— | methyl 6,6-dimethyl-5-oxo-4-(ethyloxycarbonyl)-2-[N-(9-phenylfluoren-9-yl)amino]heptanoate | 296774-86-2 | C32H35NO5 | 513.634 |
—— | (2S)-N-(9-phenylfluoren-9-yl)alanine | 105519-71-9 | C22H19NO2 | 329.398 |
Ring-opening of N-(PhF)serine-derived cyclic sulfamidate 17 was achieved with different nucleophiles (β-keto esters, β-keto ketones, dimethyl malonate, nitroethane, sodium azide, imidazole, and potassium thiocyanate) to prepare a variety of amino acid analogs. Two different pathways for ring opening of 17 were elucidated: direct nucleophilic displacement, as well as β-elimination followed by Michael addition. Furthermore, β-keto ester and β-keto ketone products 18k,18m, and 18i were converted to prolines and pyrazole amino acids.Key words: glutamate, amino acid, cyclic sulfamidate, proline.