1143-50-6Relevant articles and documents
Visible-Light-Induced Cycloaddition of α-Ketoacylsilanes with Imines: Facile Access to β-Lactams
Ye, Jian-Heng,Bellotti, Peter,Paulisch, Tiffany O.,Daniliuc, Constantin G.,Glorius, Frank
supporting information, p. 13671 - 13676 (2021/05/11)
We report the synthesis of β-lactams from α-ketoacylsilanes and imines, which proceeds via a formal [2+2] photochemical cycloaddition with in situ generation of siloxyketene. This mild and operationally simple reaction proceeds in an atom-economic fashion with broad substrate scope, including aldimines, ketimines, hydrazones, and fused nitrogen heterocycles, affording a variety of important β-lactams with satisfactory diastereoselectivities in most cases. This reaction also features good functional-group tolerance, facile scalability and product diversification. Experimental and computational studies suggest that α-ketoacylsilanes can serve as photochemical precursors by engaging in a 1,3 silicon shift to the distal carbonyl group.
Mechanistic study of a complementary reaction system that easily affords quinazoline and perimidine derivatives
Wang, Zerong Daniel,Eilander, Joshua,Yoshida, Motoko,Wang, Tianzhi
supporting information, p. 7664 - 7674 (2015/04/22)
A new reaction between 2-aminobenzophenone and thiourea in dimethyl sulfoxide (DMSO) has been developed that primarily affords 4-phenylquinazoline as a single product. This reaction is also applicable, in general, to the reactions between thiourea and conformation-restricted β-amino ketones, such as 1-aminoanthracene-9,10-dione and 1-amino-9H-fluoren-9-one, to prepare perimidine derivatives. Experimental data is consistent with our computational study on the thermal decomposition of thiourea to form hydrogen sulfide and carbodiimide. This reaction involves a coupling between 2-aminobenzophenone and carbodiimide generated in situ from thiourea to form 4-phenylquinazolin-2(1H)-imine intermediate, and the generation of sulfur-containing reducing agent from hydrogen sulfide and DMSO, which reduces 4-phenylquinazolin-2(1H)-imine to 4-phenyl-1,2-dihydroquinazolin-2-amine. Elimination of ammonia from the latter yields 4-phenylquinazoline.
Iron-catalyzed C-H and C-C bond cleavage: A direct approach to amides from simple hydrocarbons
Qin, Chong,Zhou, Wang,Chen, Feng,Ou, Yang,Jiao, Ning
supporting information; experimental part, p. 12595 - 12599 (2012/01/15)
Something functional: The title reaction proceeds in the presence of azide and water to deliver amides in high yields, and it can be used in a ring-expansion strategy to generate lactams. A mechanism is proposed based on experimental results. This reaction offers a new approach to functionalizing simple and readily available hydrocarbons. DDQ=2,3-dichloro-5,6-dicyano-1,4- benzoquinone. Copyright
