Catalytic asymmetric oxo-Diels–Alder reactions with chiral atropisomeric biphenyl diols
作者:Chi-Tung Yeung、Wesley Ting Kwok Chan、Wai-Sum Lo、Ga-Lai Law、Wing-Tak Wong
DOI:10.3762/bjoc.15.92
日期:——
New chiral atropisomeric biphenyl diols 3, 4 and 6 containing additional peripheral chiral centers with different steric bulkiness and/or electronic properties were synthesized. The X-ray crystal structure of 3 shows the formation of a supramolecular structure whereas that of 6, containing additional CF3 substituents, shows the formation of a monomeric structure. Diols 1–6 were found to be active organocatalysts