In recent years, the reactions of abundantly available, inexpensive, and structurally diverse alkenyl acids (-C=C-COOH) with C-X (X = halogen) or C-H coupling partner have emerged as vital strategies for the streamlined synthesis of functionalized alkenes with extrusion of innocuous CO₂. Various alkenyl acids such as cinnamic acids can act as stable surrogates for the polymerization prone styrenes/olefins, which otherwise need special attention for their handling and storage. Furthermore, cinnamic acids can be easily prepared through various methodologies including Knoevenagel-Doebner (KD) condensation, Heck coupling reaction, etc. Recently, various one-pot tandem methodologies involving the decarboxylative coupling of KD/Heck sequence with C-H or C-X substrate have come into fore. The present review article edifies about the recent advances, scope and limitations for C-C bond formation via (i) direct decarboxylative functionalization of C-X or C-H substrate with alkenyl acids, (ii) tandem one-pot multicomponent decarboxylative approaches (involving in situ generated alkenyl acids) e.g. coupling of KD/Heck sequences with C-X or C-H substrate.

近年来，大量可用，廉价且结构多样的烯基酸（-C = C-COOH）与CX（X =卤素）或CH偶联伙伴的反应已成为流线型功能化烯烃通过挤出简化合成的重要策略无害的CO ₂。各种链烯基酸（如肉桂酸）可以作为易于聚合的苯乙烯/烯烃的稳定替代物，否则在处理和存储时需要特别注意。此外，肉桂酸可通过多种方法轻松制备，包括Knoevenagel-Doebner（KD）缩合，Heck偶联反应等。。最近，涉及KD / Heck序列与CH或CX底物的脱羧偶联的各种一锅串联方法已成为主流。本文综述了通过（i）用烯基酸对CX或CH底物进行直接脱羧功能化，（ii）串联单锅多组分脱羧方法（涉及原位生成的烯基酸）形成CC键的最新进展，范围和局限性）例如。KD / Heck序列与CX或CH底物的偶联。