Convenient Synthesis of 3,4-methano-1,2,3,4-tetrahydroisoquinoline-3-carboxylic Acid and Its Derivatives as Doubly Constrained Nonproteinogenic Amino Acid Derivatives
作者:József Czombos、Wim Aelterman、Alexey Tkachev、José C. Martins、Dirk Tourwé、Antal Péter、Géza Tóth、Ferenc Fülöp、Norbert De Kimpe
DOI:10.1021/jo9917994
日期:2000.9.1
4-methano-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid in a convenient way. A detailed 2D DQF-COSY and 2D NOESY NMR analysis of the rotational isomerism of the latter bicyclic amino acid derivatives was performed. Various O- and N-protection protocols were worked out to afford access to a whole range of new derivatives of the title amino acid, suitable for peptide synthesis.
评估了新颖的双约束3,4-甲基-1,2,3,4-四氢异喹啉-3-羧酸及其衍生物的三种合成策略。在碳酸钾存在下,仅在1,2-二甲氧基乙烷中将1,2-双(溴甲基)苯衍生的单(三苯基)phosph盐与N-烷氧基羰基草酸酯进行环缩合,然后在二甲基亚砜中与二甲基s亚砜进行环丙烷化,得到合适的O-以方便的方式和3,4-甲基-1,2,3,4-四氢异喹啉-3-羧酸的N-保护的衍生物。对后者的双环氨基酸衍生物的旋转异构进行了详细的2D DQF-COSY和2D NOESY NMR分析。制定了各种O保护和N保护协议,以提供对标题氨基酸的新衍生物的整个访问范围,