A Novel Rearrangement of Cyclic Glutamine Derivatives: Ring Contraction in 3,6-Diamino-2,3,4,5-tetrahydropyridin-2-ones to Yield 5-Iminoproline Amides
作者:Vladimir N. Belov、Viktor V. Sokolov、Boris D. Zlatopolskiy、Armin de Meijere
DOI:10.1002/ejoc.201100404
日期:2011.8
A new rearrangement of the cyclic L-glutamine derivative(S)-6-carbamoylamino-3-(methylamino)-2,3,4,5-tetrahydropyridin-2-one (2) and its descarbamoyl analogue 10-H was found to yield enantiomerically pure 5-carbamoylimino-1-methyl-L-proline amide (12-CONH2) and its descarbamoyl analogue 12-H, respectively. Cyclic amidines 2 and 10-H were generated from the amide N2-ZGlnOEt 3 in seven and six steps
发现环状 L-谷氨酰胺衍生物 (S)-6-carbamoylamino-3-(methylamino)-2,3,4,5-tetrahydropyridin-2-one (2) 及其去氨基甲酰基类似物 10-H 的新重排分别产生对映异构纯 5-carbamoylimino-1-methyl-L-proline 酰胺 (12-CONH2) 和它的 descarbamoyl 类似物 12-H。环脒 2 和 10-H 分别通过七步和六步从酰胺 N2-ZGlnOEt 3 产生。(S)-6-amino-3-[(N-benzyloxycarbonyl-N-methyl)amino]-2,3,4,5-tetrahydropyridin-2-one (8) 的脱保护直接导致 5-iminoproline 酰胺 12- H(通过 10-H 和双环邻脒 11-H)以 66% 的总产率从 3. 8 与 ZNCO(Z