Sequential Ag(I) salt and Chiral N-Heterocyclic Carbene Catalysis Enables Enantioselective and Diastereoselective Construction of Complex Heterocyclic Molecules and the Switch of Stereoselectivity was written by Wu, Pei;Zhang, Yue;Cheng, Ying. And the article was included in Journal of Organic Chemistry.Safety of 2-Bromo-4-(trifluoromethyl)benzaldehyde This article mentions the following:
Organic reactions under cascade catalysis provide a powerful strategy to construct mols. of complexed structures. Reported herein is the sequential silver(I) salt and chiral N-heterocyclic carbene (NHC) catalyzed enantioselective and diastereoselective synthesis of a diversity of unprecedented fused heterocyclic compounds from the reactions of readily available N′((2-alkynyl-3-pyridinyl)methylene)hydrazides with 2-aroylvinylcinnamaldehydes. Both reaction pathways and stereoselectivity were steered conveniently and efficiently by the employment of different NHCs and bases, enabling the selective preparation of pentacyclic ring-fused 1,6-naphthyridine derivatives and 1,6-naphthyridine-substituted tricyclic products in moderated to good yields with high enantioselectivity and diastereoselectivity. Mechanisms accounting for the selective transformations, especially the effect of base and chiral NHC catalyst on the reaction course and stereochem. of products were also discussed. In the experiment, the researchers used many compounds, for example, 2-Bromo-4-(trifluoromethyl)benzaldehyde (cas: 85118-24-7Safety of 2-Bromo-4-(trifluoromethyl)benzaldehyde).
2-Bromo-4-(trifluoromethyl)benzaldehyde (cas: 85118-24-7) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Safety of 2-Bromo-4-(trifluoromethyl)benzaldehyde
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary