Chiral guanidine catalyzed cyclization reactions of 1,3-enynes for lactone synthesis: switchable H-bond catalysis
Yongyan Zhang, Lichao Ning, Tianxin Zhu, Xie Zheng, Shunxi Dong, Xiaoming Feng, Xiaohua Liu
Abstract
Cyclization and 1,4-conjugate addition/cyclization between 2-activated 1,3-enynes and azlactones were achieved with chiral guanidine-amides for enol-type activation to yield a range of δ-lactone derivatives.
Topics & Concepts
ChemistryGuanidineCatalysisYield (engineering)EnolConjugateLactoneCombinatorial chemistryOrganic chemistryStereochemistryMathematicsMathematical analysisMetallurgyMaterials scienceSynthetic Organic Chemistry MethodsSynthesis and Catalytic ReactionsChemical Synthesis and Analysis