A convenient synthesis of chiral 2-alkynyl-1,3-oxazolines
摘要:
A general, high-yielding, two-step synthesis of chiral 2-alkynyl-1,3-oxazolines starting from 2-alkynoic acids and 2-aminoalcohols is disclosed. (C) 2000 Published by Elsevier Science Ltd.
A convenient synthesis of chiral 2-alkynyl-1,3-oxazolines
摘要:
A general, high-yielding, two-step synthesis of chiral 2-alkynyl-1,3-oxazolines starting from 2-alkynoic acids and 2-aminoalcohols is disclosed. (C) 2000 Published by Elsevier Science Ltd.
Intermolecular Asymmetric Carboesterification of Alkenes by Using Chiral Amine Auxiliaries under O<sub>2</sub>: Synthesis of Enantioenriched α-Methylene-γ-Lactones through Chloropalladation of Alkynes
Herein, the first example of chloropalladation‐initiated asymmetric intermolecularcarboesterification of alkenes with alkynes by using chiral amine auxiliaries is reported. The use of (1S,2S)‐N1,N1‐dimethylcyclohexane‐1,2‐diamine auxiliaries is essential for providing α‐methylene‐γ‐lactones products in moderate to high yields and excellent enantioselectivities at room temperature. Moreover, the chiral