Practical Sulfonylation of Amines with 4‐Hydroxybenzenesulfonyl Chloride: In Situ Silylation–Desilylation
摘要:
A one-pot procedure for the efficient sulfonylation of amines with 4-hydroxybenzenesulfonyl chloride involving in situ protection and deprotection of the phenol with N,O-bis(trimethylsilyl)acetamide (BTSA) is presented.
Disclosed herein are monomeric compounds having the formula: ##STR1## wherein: R and R.sup.1 are independently hydrogen, halide or alkyl; R.sup.2 and R.sup.3 are independently hydrogen, alkyl, cycloalkyl, aryl or aralkyl; q is 0 or 1; and Ar is arylene wherein no more than one of R.sup.2 and R.sup.3 is hydrogen, and a method of preparing same. These monomers can be homopolymerized or copolymerized with one or more other monomers to yield polymers having desirable solubility characteristics. In particular, copolymerizable ethylenically unsaturated monomers can comprise aldehyde-containing vinylaryl ethers to yield crosslinkable polymers useful in relief image materials or as binders in photographic layers.