Beilstein J. Org. Chem.2018,14, 1389–1412, doi:10.3762/bjoc.14.117
calixarenes prepared by these ways have been widely used in chiral recognition [23][24], the use of calixarenes in asymmetric catalysis is a new emerging area.
This review attempts to illustrate a systematic overview of recent progress in asymmetric catalysis using different chiralcalixarene derivatives
enantiomerically pure (S)-(2-diphenylthiophosphinoferrocenyl)methanol. Deprotection of the thiophosphine unit(s) by tris(dimethylamino)phosphine gave chiralcalixarene phosphines 27–29 bearing ferrocenyl substituents on the lower rim in high yields.
Calixarene-derived mono(ferrocenylphosphine) ligands 27 and 28
to synthesize inherently chiral calixarenes 36 and 37 [43][44]. In a continuation of their previous studies, they have reported diastereoselective synthesis of inherently chiralcalixarene derivatives 38 and 39 via chiral tert-butyloxazoline-directed lithiation (Figure 4) [45]. It has been shown that