Asymmetric synthesis of (2R,5R)-2,5-diaminohexan-1,6-dioic acid
作者:Steven D Bull、Alexander N Chernega、Stephen G Davies、William O Moss、Richard M Parkin
DOI:10.1016/s0040-4020(98)00492-x
日期:1998.8
Schollkopf's auxiliary 16 was added to bis-lactim iodide 21 to give 1,2-bis[(3S,6R)-3,6- dihydro-2,5-dimethoxy-3-isopropylpyrazin-6-yl]ethane 22 in 50% d.e. Dimer 22 was separated from its diastereoisomer 23 and deprotected using 6M HCl to afford homochiral (2R,5R)-2,5-diaminohexan-1,6-dioic acid 24. (C) 1998 Elsevier Science Ltd. All rights reserved.
Stereospecific synthesis of meso-diaminodicarboxylic acids.
The hetero Diels-Alder adducts 1 derived from azodibenzoyl and cyclic dienes were transformed to the meso-diaminodicarboxylic acids 6 via the new cyclic hydrazoacetic acids 3.