13156-02-0Relevant academic research and scientific papers
Switchable synthesis of cyclic carbamates by carbon dioxide fixation at atmospheric pressure
Toda, Yasunori,Shishido, Minoru,Aoki, Tatsuya,Sukegawa, Kimiya,Suga, Hiroyuki
supporting information, p. 6672 - 6675 (2021/07/13)
The base-promoted switchable synthesis of five- and six-membered cyclic carbamates using atmospheric pressure carbon dioxide as the C1 source was developed. The chemoselectivity of products was simply controlled by changing bases and solvents. The reaction proceeds effectively under mild conditions, affording valuable cyclic carbamates. Experimental results and DFT studies revealed the reaction mechanism.
Preparation of Trimethylsilyl Ethers of 3-Azetidinols . Scope and Limitations
Higgins, Robert H.,Watson, Monique R.,Faircloth, William J.,Eaton, Quentin L.,Jenkins, Harvey
, p. 383 - 387 (2007/10/02)
Preparation of the trimethylsilyl ethers of 1-alkyl-3-azetidinols from-non-hindered primary amines and epichlorhydrin by conversion of the intermediate 1-(alkylamino)-3-chloro-2-propanols to their trimethylsilylethers by either N-(trimethylsilyl)acetamide or by 1-(trimethylsilyl)imidazole followed by ring closure in acetonitrile is described.This sequence of reactions fails for aromatic amines, but appears to be general for all primary aliphatic amines, although the condensation of hindered amines with epichlorhydrin occurs slowly.Several novel azetidinols, in which the N-alkyl substituent insefl contains a second heterocyclic system, are reported.In addition, the pKA's of several m- and p-substituted 1-benzylazetidinols correlates well with the Hammett equation.
Preparation of 3-Azetidinols with Non-Bulky 1-Alkyl Substituents
Higgins, Robert H.,Eaton, Quentin L.,Worth, Leroy,Peterson, Myra V.
, p. 255 - 259 (2007/10/02)
Cyclization of either the tetrahydropyranyl or trimethylsilyl ether of 1-(alkylamino)-3-chloro-2-propanols 1 followed by cleavage of the azetidinyl ether provides a general method for the preparation of 1-alkyl-3-azetidinols.Unhindered amines provide a more facile preparation of derivatives of 1, or its ethers, than do hindered amines, while hindered derivatives of 1 undergo more facile ring closure.
