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Molecules 2000, 5(8), 1011-1013; doi:10.3390/50801011

2-Substituted-1,3,2-dithioborolans as Chiral Lewis Acid Catalysts

*  and
School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
* Author to whom correspondence should be addressed.
Received: 29 June 2000 / Accepted: 10 August 2000 / Published: 15 August 2000
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1,3,2-Dithioborolans substituted at the 2-position with various homochiral groups can act as chiral Lewis acids in the Diels-Alder reaction between crotonaldehyde or methacrolein with cyclopentadiene. The endo:exo selectivities obtained were good although the enantiomeric excesses were low to moderate.
Keywords: boron heterocycle; Lewis acid; Diels-Alder boron heterocycle; Lewis acid; Diels-Alder
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Howarth, J.; Glynn, P. 2-Substituted-1,3,2-dithioborolans as Chiral Lewis Acid Catalysts. Molecules 2000, 5, 1011-1013.

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