Halogen‐Free Synthesis of Carbamates from CO 2  and Amines Using Titanium Alkoxides | Zendy

Choi JunChul | Zendy; Yuan HaoYu | Zendy; Fukaya Norihisa | Zendy; Onozawa Syunya | Zendy; Zhang Qiao | Zendy; Choi Seong Jib | Zendy; Yasuda Hiroyuki | Zendy

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Halogen‐Free Synthesis of Carbamates from CO 2 and Amines Using Titanium Alkoxides

Author(s) -

Choi JunChul,

Yuan HaoYu,

Fukaya Norihisa,

Onozawa Syunya,

Zhang Qiao,

Choi Seong Jib,

Yasuda Hiroyuki

Publication year - 2017

Publication title -

chemistry – an asian journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.18

H-Index - 106

eISSN - 1861-471X

pISSN - 1861-4728

DOI - 10.1002/asia.201700465

Subject(s) - aniline , chemistry , halogen , yield (engineering) , titanium , carbon dioxide , titanium dioxide , inorganic chemistry , nuclear chemistry , organic chemistry , carbon fibers , medicinal chemistry , materials science , metallurgy , alkyl , composite number , composite material

A direct synthesis of carbamates from amines and carbon dioxide in the presence of Ti(OR) 4 (R= n Bu ( 1 ), Me ( 2 ), Et ( 3 ), n Pr ( 4 )) was investigated. Aniline was reacted with titanium n ‐butoxide ( 1 ) in the presence of carbon dioxide (5 MPa) to give the corresponding n ‐butyl N ‐phenylcarbamate (BPC) in nearly quantitative yield (99 %) within 20 min. Furthermore, 1 could be regenerated upon reaction with n ‐butanol during water removal. The recovered 1 could then be reused in a subsequent reaction.

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