Hindered organoboron groups in organic chemistry. 24. The condensation of aliphatic aldehydes with dimesitylboron stabilised carbanions to give ketones.
作者:Andrew Pelter、Keith Smith、Said M.A. Elgendy、Martin Rowlands
DOI:10.1016/s0040-4020(01)87982-5
日期:1993.8
The condensation of boron stabilised carbanions, Mes2BCHLiR1, (R1≠H) with aliphatic aldehydes, R2CHO, followed by treatment with trifluoroacetic anhydride (TFAA) or N-chlorosuccinimide (NCS) is an unique, broadly applicable redox process that yields ketones, R1CH2COR2, directly and in high yields. The anion Mes2BCH2Li (Mes2BCHLiR1, R1H) gives high yields of alkenes, R2CHCH2 in the same conditions
硼稳定的碳负离子Mes 2 BCHLiR 1(R 1 ≠H)与脂族醛R 2 CHO的缩合,然后用三氟乙酸酐(TFAA)或N-氯代琥珀酰亚胺(NCS)处理是一种独特的,广泛适用的氧化还原工艺可以直接且高产率地产生酮R 1 CH 2 COR 2。阴离子Mes 2 BCH 2 Li(Mes 2 BCHLiR 1,R 1 = H)在相同条件下产生高产率的烯烃R 2 CH = CH 2。