J. Kiegiel et al., Synthesis and asymmetric hydrogenation of 3,5-dioxoheptanedioates. Preparation of enantiomerically pure substituted delta-valerolactones, TETRAHEDR L, 41(25), 2000, pp. 4959-4963
The synthesis of 3,5-dioxoheptanedioic acid derivatives based on the reacti
on of ketene with malonyl chloride was developed. Resulting diketones were
subjected to Ru-(S)-BINAP-catalyzed asymmetric hydrogenation. The products
were transformed into enantiomerically pure 3,5-substituted-delta-valerolac
tones. (C) 2000 Elsevier Science Ltd. All rights reserved.