Triethylamine → HCID 53635317, compound

This compound was prepared in several steps. 4-pentenoic acid (1.2.6.4) was reacted with ethylchloroformate in the usual way to obtain the active mixed anhydride. To a solution of the mixed anhydride in chloroform was added triethylamine and O-benzylhydroxylamine hydrochloride to obtain O-benzyl-4-pentenohydroxamic acid (1.2.6.5). The double bond was oxidized using osmium tetroxide/N-methylmorpholine oxide to give the diol (1.2.6.6). The terminal hydroxyl group was then protected with t-butyldimethylsilylchloride in the usual way to yield (1.2.6.7). The secondary hydroxyl group was tosylated using pyridine/p-toluenesulfonyl chloride. Cyclization of (1.2.6.8) to the corresponding pyrrolidone (1.2.6.9) was effected by using sodium carbonate in methanol. The protecting silyl group was removed by treatment with tetraethylammonium fluoride. The title compound (1.2.6.3) was prepared by reacting the latter compound (1.2.6.10) with pyridine/p-toluenesulfonyl chloride in the usual way. ##STR44##

1. customThis compound was prepared in several steps
2. customto obtain the

ORD record

ord-3d574ece31b44cc9ba58d85ac12b7e2b

Source dataset

uspto-grants-2000_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06165996