期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2021, 期 2, 页码 220-234出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.202001114
关键词
Cascade catalysis; Thiourea; Tertiary amine; Bifunctional catalysts; Polycyclic systems
资金
- IIT Madras
- CSIR-INDIA
- SERB-DST [CRG/2019/000988]
The research discusses the recent advancements in bifunctional organocatalyst promoted, relay-cascade catalysis, highlighting its potential for green synthesis. The cascade catalysis is categorized into double-, triple-, and quadruple cascades, each involving different combinations of reactions. This strategy has successfully achieved diverse polycyclic structural frameworks, showing promise for further development in greener chemistry approaches.
The bifunctional organocatalyst promoted, relay-cascade catalysis (use of a single catalyst capable of promoting each catalytic cycle in the designed cascade process) has been the hot area of research in recent times, as it enables the green synthesis of complex molecular architectures in an atom, cost, and step-economic fashion. In this context we summarized the recent developments in the area of the thiourea-tert-amine based cascade catalysis in the current review article. The discussion was divided into three subsections. double-, triple-, and quadruple cascades depending on the number of individual steps involved in the cascade process. In each type there are various combinations of reactions like Michael addition, aldol reaction, Henry reaction, Knoevenagel reaction, cyclization, trans-esterifications etc. Divergent polycyclic structural frameworks have been achieved employing this cascade catalytic strategy as evidenced in this review. We assume that the current review article would be a handle for the design and development as well as further growth of this potential greener approach.
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