通过在含有1当量的乙醇水溶液中添加双芳基磺酰基甲烷,最方便地制备双芳基磺酰基重氮甲烷。氢氧化钠至3摩尔。当量 甲苯的p-磺酰叠氮化物。如Klages和Bott所建议的那样,以等摩尔量的反应物进行的相反添加顺序是不能令人满意的,因为在这些条件下,首先形成的重氮二砜发生了副反应,其主要产物是双芳基磺酰基甲醛(XI)。在无水四氢呋喃中,α-重氮-β-二砜与2 mol反应。当量的β-二磺酸钠盐提供乙烯基hydr和戊烯磺酸钠。后者必须完全来自碳负离子,因为双苯基磺酰基重氮甲烷(V; Ar = Ph)与2,4-二甲苯基二砜(II; Ar = 2,4-二甲苯基)产生的碳负离子仅产生2,4-二甲苯亚磺酸钠,而双2,4-二甲苯基磺酰重氮甲烷与苯基二砜的碳负离子之间存在类似的反应(II; Ar = Ph)仅提供苯磺酸钠。相反,当重氮化合物与含有羰基而不是磺酰基的碳负离子偶合时,就会从重氮化合物中消除亚磺酸盐。讨论了反应机理。
通过在含有1当量的乙醇水溶液中添加双芳基磺酰基甲烷,最方便地制备双芳基磺酰基重氮甲烷。氢氧化钠至3摩尔。当量 甲苯的p-磺酰叠氮化物。如Klages和Bott所建议的那样,以等摩尔量的反应物进行的相反添加顺序是不能令人满意的,因为在这些条件下,首先形成的重氮二砜发生了副反应,其主要产物是双芳基磺酰基甲醛(XI)。在无水四氢呋喃中,α-重氮-β-二砜与2 mol反应。当量的β-二磺酸钠盐提供乙烯基hydr和戊烯磺酸钠。后者必须完全来自碳负离子,因为双苯基磺酰基重氮甲烷(V; Ar = Ph)与2,4-二甲苯基二砜(II; Ar = 2,4-二甲苯基)产生的碳负离子仅产生2,4-二甲苯亚磺酸钠,而双2,4-二甲苯基磺酰重氮甲烷与苯基二砜的碳负离子之间存在类似的反应(II; Ar = Ph)仅提供苯磺酸钠。相反,当重氮化合物与含有羰基而不是磺酰基的碳负离子偶合时,就会从重氮化合物中消除亚磺酸盐。讨论了反应机理。
1-Fluoro-1,1-Bis-(Phenylsulfonyl)Methane and Production Method Thereof
申请人:Toru Takeshi
公开号:US20090131723A1
公开(公告)日:2009-05-21
A novel 1-fluoro-1,1-bis(arylsulfonyl)methane is provided which is useful in monofluoromethylation. Also provided is a production method thereof.
A method for producing a fluorobis(arylsulfonyl)methane, the method including the steps of: treating a bis(arylsulfonyl)methane represented by the following formula (1),
(ArSO
2
)
2
CH
2
(1)
(wherein Ar represents a substituted or unsubstituted phenyl group or naphthyl group)
with a base; and then adding a fluorination reagent thereto, to produce fluorobis(arylsulfonyl)methane represented by the following formula (2)
(ArSO
2
)
2
CHF (2)
(wherein Ar is defined as above), and
a fluorobis(arylsulfonyl)methane (2) represented by the above formula (2), which is a novel compound that is very useful in producing a monofluoromethyl.
Preparation of α-diazo-β-disulphones; a novel sulphinate elimination in their coupling reactions
作者:G. Heyes、G. Holt
DOI:10.1039/p19730000189
日期:——
4-xylenesulphinate whilst a similar reaction between bis 2,4-xylylsulphonyldiazomethane and the carbanion from the phenyl disulphone (II; Ar = Ph) provides only sodium benzenesulphinate. In contrast, sulphinate elimination occurs from the diazo-compound when it is coupled with a carbanion containing carbonyl rather than sulphonyl groups. The mechanism of the reactions is discussed.
通过在含有1当量的乙醇水溶液中添加双芳基磺酰基甲烷,最方便地制备双芳基磺酰基重氮甲烷。氢氧化钠至3摩尔。当量 甲苯的p-磺酰叠氮化物。如Klages和Bott所建议的那样,以等摩尔量的反应物进行的相反添加顺序是不能令人满意的,因为在这些条件下,首先形成的重氮二砜发生了副反应,其主要产物是双芳基磺酰基甲醛(XI)。在无水四氢呋喃中,α-重氮-β-二砜与2 mol反应。当量的β-二磺酸钠盐提供乙烯基hydr和戊烯磺酸钠。后者必须完全来自碳负离子,因为双苯基磺酰基重氮甲烷(V; Ar = Ph)与2,4-二甲苯基二砜(II; Ar = 2,4-二甲苯基)产生的碳负离子仅产生2,4-二甲苯亚磺酸钠,而双2,4-二甲苯基磺酰重氮甲烷与苯基二砜的碳负离子之间存在类似的反应(II; Ar = Ph)仅提供苯磺酸钠。相反,当重氮化合物与含有羰基而不是磺酰基的碳负离子偶合时,就会从重氮化合物中消除亚磺酸盐。讨论了反应机理。