Alkylated or alkenylated malonic acid or its derivatives having a
申请人:Daikin Kogyo Co., Ltd.
公开号:US04578503A1
公开(公告)日:1986-03-25
An alkylated or alkenylated malonic ester having a fluorine containing aliphatic substituent and derivatives thereof as expressed by the following general formula: ##STR1## where R.sub.f is a fluorine containing aliphatic group, R is an aliphatic group, or hydrogen or alkali metal atom, and R' is an unsubstituted or substituted aliphatic group. And a method to trap the enolate ion of a malonic ester having a fluorine containing aliphatic substituent as expressed by the following general formula, R.sub.f CH(CO.sub.2 R).sub.2 where R.sub.f is a fluorine containing aliphatic group and R is an aliphatic group, hydrogen or alkali metal atom, wherein said malonic ester is converted under the action of a weaker base and/or fluoride ion to a fluorine containing enolate ion to be trapped as expressed by the following general formula: R.sub.f C.sup..crclbar. (CO.sub.2 R).sub.2 where R.sub.f and R are the same as above.
Convenient Preparation of Dimethyl (Trifluoromethyl)malonate and Related Compounds
作者:Nobuo Ishikawa、Tsutomu Yokozawa
DOI:10.1246/bcsj.56.724
日期:1983.3
The preparative method for dimethyl (trifluoromethyl)malonate (4) from the adduct of perfluoro-2-methylpropene with methanol was improved, and several reactions of this base-sensitive substance were investigated. Alkylation of 4 was achieved by using CsF as a condensing agent, and the Michael addition on vinyl ketones proceeded in triethylamine–pyridine medium.
A method to trap the enolate ion of the malonic acid or its derivatives
申请人:Daikin Kogyo Co., Ltd.
公开号:EP0103233A2
公开(公告)日:1984-03-21
An alkylated or alkenylated malonic ester having a fluorine containing aliphatic substituent and derivatives thereof as expressed by the following general formula:
where Rf is a fluorine containing aliphatic group, R is an aliphatic group, or hydrogen or alkali metal atom, and R' is an unsubstituted or substituted aliphatic group.
And a method to trap the enolate ion of a malonic ester having a fluorine containing aliphatic substituent as expressed by the following general formula,
where Rf is a fluorine containing aliphatic group and R is an aliphatic group, hydrogen or alkali metal atom, wherein said malonic ester is converted under the action of a weaker base and/or fluoride ion to a fluorine containing enolate ion to be trapped as expressed by the following general formula:
where Rf and R are the same as above.