Cai, Libo;Zhu, Xiaoyi;Chen, Jiayi;Lin, Aijun;Yao, Hequan published 《Rh(III)-Catalyzed C-H activation/annulation of salicylaldehydes with sulfoxonium ylides for the synthesis of chromones》 in 2019. The article was appeared in 《Organic Chemistry Frontiers》. They have made some progress in their research.Application In Synthesis of (1S)-4,7,7-Trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carbonyl chloride(Chunks or pellets) The article mentions the following:
A rhodium(III)-catalyzed C-H activation/annulation of salicylaldehydes e.g., 2-OHC6H4CHO with sulfoxonium ylides RC(O)CH=S(O)(CH3)CH3 (R = Ph, t-Bu, cyclohexyl, thiophen-2-yl, etc.) has been developed for the formation of 2-substituted chromones e.g., I in good yields with broad functional group tolerance. The utility of this strategy was showcased by the late-stage modification of some biol. active mols. Moreover, structurally diverse 2,3-disubstituted chromones II (R1 = Cl, CF3, diethoxyphosphoroso, etc.) were also constructed by the C3 C-H functionalization reactions. To complete the study, the researchers used (1S)-4,7,7-Trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carbonyl chloride(Chunks or pellets) (cas: 39637-74-6) .
(1S)-4,7,7-Trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carbonyl chloride(Chunks or pellets) (cas: 39637-74-6 Application In Synthesis of (1S)-4,7,7-Trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carbonyl chloride(Chunks or pellets)) is a chiral derivatizing agent. It can be prepared by reacting (-)-(1S,4R)-camphanic acid with thionyl chloride.
Reference:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics