7766-37-2Relevant articles and documents
Synthesis of 4-Trifluoromethylated 1,3-Butadienes via Palladium Catalyzed Heck Reaction
Li, Yang,Hao, Meng,Chang, Yu-Chen,Liu, Yuan,Wang, Wen-Fei,Sun, Ning,Zhu, Wen-Qing,Gao, Ziwei
supporting information, p. 2962 - 2966 (2021/08/23)
1,3-Butadiene plays a key role in modern synthetic chemistry and biochemistry because it is a key intermediate in the synthesis of many drugs. A new and effective method for the synthesis of 4-trifluoromethylated 1,3-butadiene through the fluorinated Heck reaction catalyzed by Pd(0) is described. Without additives, 1-chloro-3,3,3-trifluoropropene (an inexpensive CF3 structural unit that is harmless to ozone) reacts with enamide to synthesize 4-trifluoromethylated 1,3-butadienes with good yield, high regioselectivity and chemical selectivity, and strong tolerance of substrate functional groups such as alkynes, aldehyde, and ester groups.
Silyl Radical-Mediated Activation of Sulfamoyl Chlorides Enables Direct Access to Aliphatic Sulfonamides from Alkenes
Gouverneur, Véronique,Hell, Sandrine M.,Laudadio, Gabriele,Meyer, Claudio F.,Misale, Antonio,No?l, Timothy,Trabanco, Andrés A.,Willis, Michael C.
supporting information, p. 720 - 725 (2020/02/20)
Single electron reduction is more challenging for sulfamoyl chlorides than sulfonyl chlorides. However, sulfamoyl and sulfonyl chlorides can be easily activated by Cl-atom abstraction by a silyl radical with similar rates. This latter mode of activation was therefore selected to access aliphatic sulfonamides, applying a single-step hydrosulfamoylation using inexpensive olefins, tris(trimethylsilyl)silane, and photocatalyst Eosin Y. This late-stage functionalization protocol generates molecules as complex as sulfonamide-containing cyclobutyl-spirooxindoles for direct use in medicinal chemistry.
Rh(i)-Catalyzed regioselective arylcarboxylation of acrylamides with arylboronic acids and CO2
Cai, Lei,Fu, Lei,Gao, Yuzhen,Li, Gang,Li, Shangda,Zhou, Chunlin
supporting information, p. 7328 - 7332 (2020/11/19)
The first Rh(i)-catalyzed regioselective arylcarboxylation of electron-deficient acrylamides with arylboronic acids under atmospheric pressure of CO2 has been developed. A range of acrylamides and arylboronic acids were compatible with this reaction under redox-neutral conditions, leading to a series of malonate derivatives that are versatile building blocks in organic syntheses.