1332887-38-3Relevant academic research and scientific papers
Copper-catalyzed monochloromethylazidation to access transformable terminal alkyl chlorides using stoichiometric BrCH2Cl
Zhang, Ya-Xuan,Bian, Kang-Jie,Jin, Ruo-Xing,Yang, Chi,Wang, Xi-Sheng
supporting information, p. 5666 - 5669 (2021/06/17)
Efficient copper-catalyzed 1,2-difunctionalization of alkenes with commercially available BrCH2Cl as a chloromethylating source was carried out, in which mild conditions, high reactivity, excellent functional-group tolerance, and late-stage modification of a bioactive molecule are demonstrated. This strategy offers a solution for the diverse syntheses of nitrogen-containing terminal alkyl chlorides, a common synthetic handle that is promising for multiple derivatizations. Mechanistic studies indicate that a chloromethyl radical is involved in the catalytic cycle. This journal is
Copper-catalyzed direct transformation of secondary allylic and benzylic alcohols into azides and amides: An efficient utility of azide as a nitrogen source
Rokade, Balaji V.,Gadde, Karthik,Prabhu, Kandikere Ramaiah
, p. 2706 - 2717 (2015/04/27)
A mild and convenient method for the synthesis of amides has been explored by using secondary alcohols, Cu(ClO4)2·6H2O as a catalyst, and trimethylsilyl azide (TMSN3) as a nitrogen source in the presence of 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) at ambient temperature. This method has been successfully adapted to the preparation of azides directly from their corresponding alcohols and offers excellent chemoselectivity in the formation of ω-halo azides and the azidation of allylic alcohols in the presence of a benzyl alcohol moiety. In addition, this strategy provides an opportunity to synthesize azides that can serve as precursors to β-amino acids. A mild and convenient method for the synthesis of amides has been explored by using secondary alcohols, Cu(ClO4)2·6H2O as a catalyst, and trimethylsilyl azide (TMSN3) as a nitrogen source in the presence of 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) at ambient temperature. This method has also been adapted to the preparation of azides directly from their corresponding alcohols.
Chemoselective and direct functionalization of methyl benzyl ethers and unsymmetrical dibenzyl ethers by using iron trichloride
Sawama, Yoshinari,Goto, Ryota,Nagata, Saori,Shishido, Yuko,Monguchi, Yasunari,Sajiki, Hironao
supporting information, p. 2631 - 2636 (2014/03/21)
Methyl and benzyl ethers are widely utilized as protected alcohols due to their chemical stability, such as the low reactivity of the methoxy and benzyloxy groups as leaving groups under nucleophilic conditions. We have established the direct azidation of chemically stable methyl and benzyl ethers derived from secondary and tertiary benzyl alcohols. The present azidation chemoselectively proceeds at the secondary or tertiary benzylic positions of methyl benzyl ethers or unsymmetrical dibenzyl ethers and is also applicable to direct allylation, alkynylation, and cyanation reactions, as well as the azidation. The present methodologies provide not only a novel chemoselectivity but also the advantage of shortened synthetic steps, due to the direct process without the deprotection of the methyl and benzyl ethers. Ethers exchanged: Methyl and benzyl ethers are chemically stable and generally tolerant under nucleophilic substitution conditions. Iron-catalyzed direct functionalizations (e.g., azidation, allylation, alkynylation, and cyanation) of methyl and benzyl ethers derived from secondary and tertiary benzyl alcohols were established with excellent regioselectivities (see scheme; PG: protecting group; Bn: benzyl; Nu: nucleophile; TMS: trimethylsilyl). Copyright
Iron-catalyzed chemoselective azidation of benzylic silyl ethers
Sawama, Yoshinari,Nagata, Saori,Yabe, Yuki,Morita, Kosuke,Monguchi, Yasunari,Sajiki, Hironao
supporting information, p. 16608 - 16611 (2013/03/13)
Azidation: Siloxy groups derived from secondary and tertiary benzyl alcohols can be transformed into azide groups at room temperature using TMSN3 in the presence of an iron catalyst (see scheme; TMS=trimethylsilyl). Secondary and tertiary benzy
Direct oxidative installation of nitrooxy group at benzylic positions and its transformation into various functionalities
Kamijo, Shin,Amaoka, Yuuki,Inoue, Masayuki
, p. 4654 - 4657 (2011/09/30)
C-H Nitrooxylation at benzylic positions has been achieved by employing the N-hydroxyphthalimide (NHPI) catalyst/cerium(IV) ammonium nitrate (CAN) reagent system. The nitrooxy groups were demonstrated to function as tentative hydroxy protecting groups, as well as excellent leaving groups for N- and C-substitution reactions. Hence, the present method offers a unique way to synthesize diverse O-, N-, or C-functionalized benzylic compounds from simple alkyl aromatics.
