7175-93-1

Upstream product

• 42139-51-5 ammonium N-methyl-N-phenyldithiocarbamate 
• 106-48-9 4-chloro-phenol 
• 463-71-8 thiophosgene 
• 100-61-8 N-methylaniline 
• 19378-36-0 O-<4-Chlor-phenyl>-S--dithiocarbonat 

Downstream Products

• 1517-46-0 4-chloro-N-methyl-N-phenyl-benzamide 

Relevant academic research and scientific papers

Radical OfC transposition: A metal-free process for conversion of phenols into benzoates and benzamides

We report a metal-free procedure for transformation of phenols into esters and amides of benzoic acids via a new radical cascade. Diaryl thiocarbonates and thiocarbamates, available in a single high-yielding step from phenols, selectively add silyl radicals at the sulfur atom of the CdS moiety. This addition step, analogous to the first step of the Barton-McCombie reaction, produces a carbon radical which undergoes 1,2 OfC transposition through an O-neophyl rearrangement. The usually unfavorable equilibrium in the reversible rearrangement step is shifted forward via a highly exothermic C-S bond scission in the O-centered radical, which furnishes the final benzoic ester or benzamide product. The metal-free preparation of benzoic acid derivatives from phenols provides a potentially useful alternative to metal-catalyzed carbonylation of aryl triflates.

DIRECT CONVERSION OF PHENOLS INTO AMIDES AND ESTERS OF BENZOIC ACID

A method is provided for the preparation of an aromatic carboxylic acid aryl ester or an N-aryl aromatic carboxamide. The method comprises contacting an O,O-diaryl thiocarbonate or an O-aryl-N-aryl thiocarbamate with a reactant that regioselectively reacts with sulfur, which contact causes an O-neophyl rearrangement, thereby forming either the aromatic carboxylic acid aryl ester or the N-aryl aromatic carboxamide, respectively.

Metal-free transformation of phenols into substituted benzamides: A highly selective radical 1,2-O→C transposition in O-aryl-N-phenylthiocarbamates

Radical merry-go-round: A highly efficient metal-free transformation of phenols into benzamides is designed through one-step conversion of phenols to aryl thiocarbamates and a subsequent radical addition/rearrangement/ fragmentation cascade. Computational analysis fully rationalizes the experimentally observed selectivity. Despite the possible competition from N-C fragmentation and N-neophyl rearrangement, the transformation exclusively follows the most kinetically and thermodynamically favored O-neophyl rearrangement path.