Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1997-08-26
2000-02-01
Truong, Duc
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528 97, 528125, 528127, 528138, 528225, 528230, 528234, 528480, 528495, 528503, C08G 1600
Patent
active
060204524
ABSTRACT:
A chiral biphenyl compound includes a hindered 2,2'-substituted-1,1'-biphenyl subunit and has the following formula: ##STR1## The chiral biphenyl compounds have been shown to be useful as catalysts in asymmetric reactions. For example, an organozinc species can be formed by reacting the chiral biphenyl compound with an organozinc compound, R.sup.14 R.sup.15 Zn and then used as a catalyst for the asymmetric alkylation of an aldehyde by an organozinc compound.
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Hu Qiao-Sheng
Huang Wei-Sheng
Pu Lin
North Dakota State University
Truong Duc
LandOfFree
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