Abstract
Lithium enolates of N, N-diprotected glycine esters were reacted with isothiocyanates, affording Et{2}O coordinated lithium thiolates R}1{N(H)-C(SLi)@?C(NR{2})-COOEt (2a: R{2} = -Si(CH{3}){2}-CH{2}CH{2}-Si(CH{3}){2}-; R}1{ = Ph; 2b: R{2} = -Si(CH{3}){2}-CH{2}CH{2}-Si(CH{3}){2}-; R}1{ = -CH{2}Ph; 2c: R = Et; R}1{ = Ph), in which the carboxyl oxygen atom is coordinated to lithium. Thiolate 2a
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