S-chiral sulfinamides as highly enantioselective organocatalysts

Organic Letters

Volumn 8, Issue 25, 2006, Pages 5913-5915

  Pei, Dong ^a   Wang, Zhouyu ^a,b   Wei, Siyu ^a   Zhang, Yu ^a   Sun, Jian ^a  

^a CHENGDU INSTITUTE OF BIOLOGY   (China)

^b XIHUA UNIVERSITY   (China)

Author keywords

[No Author keywords available]

Indexed keywords

AMINE; DYES, REAGENTS, INDICATORS, MARKERS AND BUFFERS; SULFONIUM DERIVATIVE; SULFUR;

ARTICLE; CATALYSIS; CHEMISTRY; STEREOISOMERISM; SYNTHESIS;

AMINES; CATALYSIS; INDICATORS AND REAGENTS; STEREOISOMERISM; SULFONIUM COMPOUNDS; SULFUR;

EID: 33846289229     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol062633+     Document Type: Article

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50. It should be noted that the role of the internal Brønsted acidic phenol moiety of the catalysts could not be simply replaced by any external additives with similar or stronger Brønsted acidity (see the Supporting Information for data).
51. A clear, positive, nonlinear effect was observed in the 4c-catalyzed hydrosilylation of 5a (see the Supporting Information for the graphically depicted results), which seems to suggest that more than one molecule of catalyst is involved in the stereochemistry-determining step.
52. A notable feature of this reaction system is that it becomes heterogeneous after initiation, which complicates the mechanism study.