Synthesis of optically active af-(1-Ethyl-3-methylhexahydro-1,3-diazin-5-yl)- and<i>N</i>-(1-Ethyl-5-methyloctahydro-1,5-diazocin-3-yl)pyridine-3-carboxamides
作者:Yoshimi Hirokawa、Hiroshi Yamazaki、Shiro Kato
DOI:10.1002/jhet.5570390417
日期:2002.7
(9) through the intramolecular amidation of (R)-3-[N-[(2-benzyloxycarbonylamino-3-methylamino)propyl]-N-ethyl]aminopropionic acid trifluoroacetate (12), followed by lithiumaluminumhydridereduction of the resulting 6-oxo-1-ethyl-5-methyloctahydrodiazocine (13) in 41% yield. Reaction of the amines 6 and 15 with 5-bromo-2-methoxy-6-methylaminopyridine-3-carboxylic acid furnished the desired 2 and 3