4,4 -Diethoxy-1,1 -binaphthyl

The synthesis of multidentate Lewis acids is of great interest [102]. The photostimulated reactions of [o-(diethoxy-phosphoryl)-phenyl]-phosphonic acid diethyl ester with Me3Sn- ions in liquid ammonia affords the disubstitution product 6>-Z f -trimethylstannanyl-benzene 29a in 67% yield [103]. Under the same experimental conditions, 2,2/-Zus(diethylphosphoxy)-1,1 -binaphthyl 30 affords the disubstitution product 31 in high yields (Sch. 28) [103]. 

Treatment of 6,6 -dichloro-2,2 -diethoxy-l,l -binaphthyl-4,4 -te(acetylene) with one equivalent m-Pt(PEt3)2Cl2 in the presence of Cul in a mixture of diethylamine and solvent at room temperature gave cu. 40% yields of a chiral organometallic triangle Pt-complex for asymmetric catalysis <02JA12948>. 

Meio-epoxides undergo a ring-opening reaction with aromatic amines in the presence of a chiral metal-organic framework catalyst Zn2(L)(H20)2(A,A -dimethylacetamide)4 where L, [(S)-6,6 -dichloro-2,2 -diethoxy-1,T-binaphthyl-4,4 -bis(5-isophthalic acid)] is an organic linker between the zinc clusters Yields of the a-hydroxyamine ranging i from 70 to 95% with 62-89% ee were obtained using CM-stilbene epoxide and aniline. Lower yields and much lower ee values were found when different substituents were on the stilbene epoxide or the aniline. 

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