Aldol Reaction of Silyl Enol Ethers with Aldehydes under Neutral

5, 87566-96-9; 6, 33654-68-1; LiCH,CN, 20428-58-4; LiC(CH,),CN,. 50654-53-0; LiCH,COO-t-Bu, 41850-36-6; LiC(CH,)S(CH,),S,. 27969-97-1. Aldol Reaction ...
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6963

J . Am. Chem. SOC.1983, 105, 6963-6965 Scheme la

Table I. Reactions of Carbanions with Complex 2 OCH,

CH

I

combined vield.b

3

4

70

75' 100 22 27 47 97' 67 >98' 0

25' 78 73 53 3c 33