Patent ID: 7030253

Claim:
A compound having the structure wherein Q 1 is tri C 1 –C 4 alkylsilyl; Q 2 is an electrophilic protecting group selected from the group consisting of benzoyloxycarbonyl (Cbz), t-butoxycarbonyl (BOC), and those provided by an electrophilic protecting agent of the general formula wherein R x is alkyl, aryl, R′O—, R′ 2 N—, or R′S, and X is halogen, imidazoyl, benzotriazole, N-(benzyloxycarboxyloxy) succinimide, OR′, or—OOCOR′ and wherein R′ is alkyl or alkenyl having 1–6 carbons atoms, benzyl, phenyl, trichloroethyl, trifluoroethyl, 2-trimethylsilylethyl or triisopropylsilyl; and R is C 1 –C 7 alkyl or aryl, and all stereoisomers thereof.