Methyl hypofluorite (MeOF) reactions with various fluoroolefins
作者:Tetsuya Suzuta、Takashi Abe、Akira Sekiya
DOI:10.1016/s0022-1139(02)00163-x
日期:2003.1
The reaction of methyl hypofluorite (MeOF) with certain fluoroolefins, such as CF2CF2, CF2CFCF3, CF2CFOCF3, CF2CFOMe, CF2CClF, CF2CHF, CF2CH2, CHFCH2, CF2CFCFCF2, occurred in CD3CN or in the presence of NaF. Using neat MeOF in the presence of NaF was a novel method and gave good results. We observed that when more than three fluorine atoms are bonded to the CC double bond, the addition products
Methyl hypofluorite in the synthesis of 16-methoxyestradiol stereoisomers
作者:Stephanie D Jonson、D.André d’Avignon、John A Katzenellenbogen、Michael J Welch
DOI:10.1016/s0039-128x(98)00051-8
日期:1998.9
preparation of novel carbon-11 PET imaging agents. The 17-trimethylsilyl enol ethers of 3-benzyloxy and 3-trifloxyestrone were prepared as substrates to react with methyl hypofluorite. Conditions for the reaction of methyl hypofluorite with simple substrates were optimized to provide reasonable reaction yields with the steroidal substrates. Following introduction of the methoxy substituent at the 16-position
Methyl hypofluorite was until recently grouped as a hypothetical member of those smallest organic molecules which had not been synthesized. Passing F-2 through a solution of methanol in MeCN or PrCN resulted in its successful preparation. MeOF is an unique reagent, since it generates the novel electrophilic methoxylium moiety in contrast to the much more common methoxide group. This hypofluorite was reacted with several types of olefins including benzylic, cyclic, bicyclic, straight chain, and steroidal ones. In most cases the regioselectivity is very good, reflecting the unique polarization of the reagent: MeO(delta+)F(delta-). The stereoselectivity tends to be less emphasized, but usually anti addition is dominant.