Sulfonation and sulfation in the reactions of the chloro- and dichlorophenols, 3-fluorophenol and (2,3-, 2,4- and 3,4-dichlorophenoxy)acetic acid with concentrated aqueous sulfuric acid and sulfur trioxide
作者:Peter de Wit、Hans Cerfontain
DOI:10.1002/recl.19881070303
日期:——
The chloro- and dichlorophenols have been sulfonated with sulfuric acid and with SO3 in aprotic solvents. In the sulfonations with concentrated aqueous sulfuric acid, the sulfonic acid isomer distribution is determined mainly by the ortho- and para-directing and activating effect of the hydroxy substituent; this is also the determining factor in the aprotic sulfonations using up to 1.0 equiv of SO3
WIT, PETER DE;CERFONTAIN, HANS, REC. TRAV. CHIM. PAYS-BAS, 107,(1988) N 3, 121-124
作者:WIT, PETER DE、CERFONTAIN, HANS
DOI:——
日期:——
WATER-SOLUBLE NEAR-INFRARED ABSORBING COLORING MATTERS AND AQUEOUS INKS CONTAINING SAME
申请人:Hirota Koji
公开号:US20110123784A1
公开(公告)日:2011-05-26
Coloring matters represented by general formula (1) or salts thereof are simply provided at a low cost as water-soluble coloring matters which exhibit absorption in the near-infrared region. Further, aqueous ink compositions which contain the coloring matters and have excellent storage stability are also provided. In general formula (1), Nc is optionally substituted naphthalocyanine; M is a metal oxide or the like; R
1
and R
2
are each independently hydrogen or the like; A is a crosslinking group; X and Y are each independently substituted arylamino or the like; k is more than 0 but up to 12 (on average); p is 0 to less than 12; the sum of k and p is more than 0 but up to 12; and any two or the three of R
1
, R
2
and A may be united to form a ring.