Table 1. Variations of the ester moiety.

Entry	R	d.r.*	Yield, %
1	Me	50:50	90
2	i-Pr	63:37	91
3	Benzhydryl	64:36	85
4	tert-Bu (5)	80:20	90
5	Neopentyl	82:18	85
6	MCP (6)	89:11	87
7	CP	54:46	90	L = TMSCI or THF, M = TMS or Li+

OBOM or BOMO, O-benzyloxymethyl; TMSCI, chlorotrimethysilane; TBDPS, tert-butyldiphenylsilyl; CP, cyclopentyl.

^*Diastereomeric ratio determined by inverse-gated homodecoupling ¹³C NMR