Hydrogen Bond Enhanced Enantioselectivity in the Nickel-Catalyzed Transfer Hydrogenation of α-Substituted Acrylic Acid with Formic Acid
作者:Yaxin Sun、Chao Wang、Peng Yang、Jie-Yu Yue、Chang Xu、Jianrong Steve Zhou、Bo Tang
DOI:10.1021/acscatal.3c04187
日期:2023.11.3
asymmetric transferhydrogenation of α-substituted acrylic acids under mild conditions and avoided the use of high-pressure hydrogen gas was developed. The products included chiral β-amino acids and α-methyl carboxylic acids such as three nonsteroidal anti-inflammatory profens. Deuterium-labeling experiments and DFT studies pointed to an unconventional protonation of a metalacyclopropane complex formed by
作者:John W. Huffman、Julia A.H. Lainton、W. Kenneth Banner、Sammy G. Duncan、Robert D. Jordan、Shu Yu、Dong Dai、Billy R. Martin、Jenny L. Wiley、David R. Compton
DOI:10.1016/s0040-4020(96)01134-9
日期:1997.2
The synthesis of both sidechain epimers of 1′-(4), 2′-(5), 3′-methyl-(6) and 4′-methyl-Δ8-tetrahydrocannabinol (7) has been carried out. The synthetic approach entailed the acid catalyzed condensation of the appropriate substituted resorcinol with menthadienol to provide the Δ8-THC analogue. Both isomers of 1′-(4) and 2t́-Δ8-THC (5) were more potent than Δ8-THC, both in vitro and in vivo. The 3′-methyl