Sulfenate Substitution as a Complement and Alternative to Sulfoxidation in the Diastereoselective Preparation of Chiral β-Substituted β-Amino Sulfoxides
作者:Stefan C. Söderman、Adrian L. Schwan
DOI:10.1021/jo302769b
日期:2013.2.15
absolute configuration of the products makes the sulfenate protocol complementary to other existing preparations, including the commonly employed sulfoxidation of β-amino sulfides. The reactivity of N-Boc-protected 2-benzyl-2-aminoethyl iodide was found to be superior to the less stericallyencumbered n-butyl iodide. A transition state model is proposed to account for the stereochemistry of the products
Diastereoselective Access to anti-β-Hydroxy Sulfoxides from Chiral Epoxides and Prochiral Sulfenate Anions: Mechanistic Insights, Scope, and Limitation
作者:Ken Ohmori、Jian Zhang、Vipul V. Betkekar、Keisuke Suzuki
DOI:10.1055/a-2196-5592
日期:——
route to anti-β-hydroxy sulfoxides through the reaction of epoxides with sulfenate anions. Extensive experimental/computationalstudies revealed the dual special roles of MgBr2·OEt2, serving to generate the bromohydrin alkoxide intermediate, which undergoes nucleophilic attack on the prochiral sulfenate in a diastereoselective manner. The present study has opened a general stereoselective synthetic