A new synthesis of (S)-β-methyl-γ-butyrolactone and (S)-4-benzyloxy-3-methylbutanoic acid
A stereoselective synthesis of (S)-β-methyl-γ-butyrolactone [(S)-4,5-dihydro-4-methyl-2(3H)-furanone, 1] and of (S)-4-benzyloxy-3-methylbutanoic acid (2) is described. Both compounds are prepared starting from inexpensive L-ethyl lactate with overall yields of 26% and 30%, respectively. The products are valuable chiral building blocks.
Berens,Scharf
p. 832 - 834
(2007/10/02)
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