Liu, Yue Recent Advances in the Synthesis of Spiroheterocycles via N-Heterocyclic Carbene Organocatalysis. [electronic resource] - Molecules (Basel, Switzerland) Nov 2017 Publication Type: Journal Article; Review ISSN: 1420-3049 Standard No.: 10.3390/molecules22111882 doi Subjects--Topical Terms: CatalysisHeterocyclic Compounds--chemistryMethane--analogs & derivativesSpiro Compounds--chemical synthesis