作者:Nicholas J.S Harmat、Silvia Mangani、Enzo Perrotta、Danilo Giannotti、Rossano Nannicini、Maria Altamura
DOI:10.1016/s0040-4039(99)02264-9
日期:2000.2
3(S) and 3(R)-Benzyloxycarbonyl-pentanedioic acid mono-tert-butyl esters (6) were obtained as enantiopure orthogonally protected tricarballylic acid (TCA) esters. These were synthesised by alkylation of the sodium enolate derived from chiral but-3-enoyloxazolidinone imides (3) with tert-butyl bromoacetate; following the hydrolysis to remove the chiral auxiliary, benzyl esterification afforded the 2-allyl succinic acid diesters (4) that were converted to protected TCA esters after oxidation of the double bond. (C) 2000 Elsevier Science Ltd. All rights reserved.