Herein we describe an efficient construction of HCF2Se and HCF2S groups by tandem substitutions between alkyl bromides and a reagent system consisting of MSeCN (or MSCN) and Ph3P+CF2H Br-. The tandem process occurs via the first nucleophilic substitution of alkyl bromides by -SeCN (or -SCN) and the subsequent nucleophilic difluoromethylation.
Min Zhang, Jin-Hong Lin, Ji-Chang Xiao. HCF2Se/HCF2S Installation by Tandem Substitutions from Alkyl Bromides. The Journal of organic chemistry. 2021 Sep 17;86(18):13153-13159
PMID: 34476948
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