So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Wang, Wei; Bao, Zhi-Peng; Qi, Xinxin; Wu, Xiao-Feng researched the compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine( cas:52287-51-1 ).Computed Properties of C8H7BrO2.They published the article 《Nickel-Catalyzed One-Pot Carbonylative Synthesis of 2-Mono- and 2,3-Disubstituted Thiochromenones from 2-Bromobenzenesulfonyl Chlorides and Alkynes》 about this compound( cas:52287-51-1 ) in Organic Letters. Keywords: thiochromenone preparation; bromobenzenesulfonyl chloride alkyne carbonylation nickel catalyst. We’ll tell you more about this compound (cas:52287-51-1).
A nickel-catalyzed one-pot carbonylation reaction of 2-bromobenzenesulfonyl chlorides I (R = H, Me, OMe; R1 = H, OMe; RR1 = -OCH2O-, -O(CH2)2O-) with alkynes R2CCR3 (R2 = Me, Ph, 2-thienyl, etc.; R3 = Ph, 3-thienyl, 2-naphthyl, etc.) for the synthesis of thiochromenones II has been established. The alkynes were suitable substrates in this carbonylative transformation, and a broad range of 2-mono- and 2,3-disubstituted thiochromenone products II were obtained in moderate to good yields with quite high functional group compatibility. Notably, this procedure presents the first example of nickel-catalyzed carbonylative synthesis of thiochromenones II with 2-bromobenzenesulfonyl chlorides as a promising sulfur precursor.
From this literature《Nickel-Catalyzed One-Pot Carbonylative Synthesis of 2-Mono- and 2,3-Disubstituted Thiochromenones from 2-Bromobenzenesulfonyl Chlorides and Alkynes》,we know some information about this compound(52287-51-1)Computed Properties of C8H7BrO2, but this is not all information, there are many literatures related to this compound(52287-51-1).
Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics