First example of electrophilic substitution by addition–elimination (σ-substitution) in pyrroles
作者:Michael De Rosa、Ines Brillembourg
DOI:10.1039/c39860001585
日期:——
Reaction of 1-methylpyrrole with N-chloroacetanilide leads to the incorporation of an acetanilide moiety in the pyrrole ring by addition–elimination.
1-甲基吡咯与N-氯代乙酰苯胺的反应通过加成-消除反应在吡咯环中引入了乙酰苯胺部分。
Mazzara; Borgo, Gazzetta Chimica Italiana, 1904, vol. 34, p. II 125
作者:Mazzara、Borgo
DOI:——
日期:——
GILOW H. M.; BURTON D. E., J. ORG. CHEM., 1981, 46, NO 11, 2221-2225
作者:GILOW H. M.、 BURTON D. E.
DOI:——
日期:——
CONTROL OF SUSTAINED CASING PRESSURE IN WELLBORE ANNULI
申请人:Albemarle Corporation
公开号:EP3087155A1
公开(公告)日:2016-11-02
[EN] CONTROL OF SUSTAINED CASING PRESSURE IN WELLBORE ANNULI<br/>[FR] RÉGULATION DE PRESSION SOUTENUE SUR UN TUBAGE DANS DES ESPACES ANNULAIRES DE PUITS DE FORAGE
申请人:ALBEMARLE CORP
公开号:WO2015100004A1
公开(公告)日:2015-07-02
This invention provides a method for minimizing or relieving a sustained casing pressure in an annulus of a wellbore, where the annulus contains a first fluid having a density. The method comprises introducing a second fluid into the annulus. The second fluid has a density greater than the density of the first fluid and the second fluid is immiscible with the first fluid. The method is characterized in that the second fluid comprises at least one halogen-containing organic compound. The halogen-containing organic compound has one or more halogen atoms selected from fluorine, chlorine, bromine, and iodine, with the proviso that at least one of the halogen atoms is chlorine, bromine, or iodine.