217088-68-1

Upstream product

• 64-04-0 phenethylamine 
• 501-52-0 3-Phenylpropionic acid 
• 17341-93-4 2,2,2-Trichloroethyl chloroformate 

Downstream Products

• 1071493-67-8 C₁₁H₁₁Cl₃INO₂ 
• 1943-82-4 phenethyl isocyanate 

Relevant academic research and scientific papers

Catalytic Decarboxylative C?N Formation to Generate Alkyl, Alkenyl, and Aryl Amines

Transition-metal-catalyzed sp2 C?N bond formation is a reliable method for the synthesis of aryl amines. Catalytic sp3 C?N formation reactions have been reported occasionally, and methods that can realize both sp2 and sp3 C?N formation are relatively unexplored. Herein, we address this challenge with a method of catalytic decarboxylative C?N formation that proceeds through a cascade carboxylic acid activation, acyl azide formation, Curtius rearrangement and nucleophilic addition reaction. The reaction uses naturally abundant organic carboxylic acids as carbon sources, readily prepared azidoformates as the nitrogen sources, and 4-dimethylaminopyridine (DMAP) and Cu(OAc)2 as catalysts with as low as 0.1 mol % loading, providing protected alkyl, alkenyl and aryl amines in high yields with gaseous N2 and CO2 as the only byproducts. Examples are demonstrated of the late-stage functionalization of natural products and drug molecules, stereospecific synthesis of useful α-chiral alkyl amines, and rapid construction of different ureas and primary amines.

Multilevel selectivity in the mild and high-yielding chlorosilane- induced cleavage of carbamates to isocyanates

The silane-induced cleavage of a series of N-p-tolylcarbamates and N- phenethylcarbamates to isocyanates has been investigated as a function of chlorosilane, carbamate substituent, and reaction conditions. Reaction yields were determined from the isolated ureas, which were formed by trapping the corresponding isocyanates with isobutylamine. Under room-temperature conditions, multilevel selectivity in carbamate activation has been demonstrated. This selectivity together with the generality of the methodology enhances the utility of carbamates as synthetic intermediates and protecting groups. To demonstrate the effectiveness of this selectivity, a series of biscarbamates were selectively monoactivated to isocyanates in excellent yields.