Results 301 to 310 of about 43,723 (349)

Selective, Catalytic, and Dual C(sp3)-H Oxidation of Piperazines and Morpholines under Transition-Metal-Free Conditions.

Journal of Organic Chemistry, 2018
By using cheap and innocuous reagents, such as NaClO2, NaOCl, and catalytic amounts of TEMPO, a new environmentally friendly protocol for the selective and catalytic TEMPO C(sp3)-H oxidation of piperazines and morpholines to 2,3-diketopiperazines (2,3 ...
Delfino Chamorro‐Arenas, Urbano Osorio-Nieto, L. Quintero, L. Hernandez-Garcia, Fernando Sartillo‐Piscil   +4 more
semanticscholar   +1 more source

Stereospecific Synthesis of Highly Substituted Piperazines via an One-Pot Three Component Ring-Opening Cyclization from N-Activated Aziridines, Anilines, and Propargyl Carbonates.

Journal of Organic Chemistry, 2018
A simple and efficient one-pot three-component synthetic route to highly substituted and functionalizable piperazines in high yields with excellent stereoselectivity (de, ee >99%) is reported.
N. Chauhan, Sajan Pradhan, M. Ghorai
semanticscholar   +1 more source

Substituted Sulfonyl Piperazines

Journal of Pharmaceutical Sciences, 1962
Abstract In view of reports in the literature on the anticonvulsant action of various sulfonyl piperazines and of certain substituted 1-sulfonyl-4- β -aminoethylpiperazines as antishock agents, a series of mono- and disulfonyl β -aminoethylpiperazines have been prepared.
W E, LANGE, R N, LAZARUS, M E, AMUNDSON
openaire   +2 more sources

Derivatives of Piperazine. XXI. Synthesis of Piperazine and C-Substituted Piperazines

Journal of the American Chemical Society, 1947
L J, KITCHEN, C B, POLLARD
openaire   +2 more sources

Piperazine toxicity

Veterinary Record, 1987
openaire   +4 more sources

Piperazine

2021
openaire   +2 more sources

Piperazine

Reactions Weekly, 2014
A.M. Molina López, M.R. Moyano Salvago
openaire   +2 more sources

Piperazine

BMJ, 1954
  +4 more sources

New phenolic Mannich bases with piperazines and their bioactivities.

Bioorganic chemistry (Print), 2019
H. Gul, M. Tuğrak, M. Gul, Sertac Mazlumoglu, H. Sakagami, I. Gulcin, C. Supuran   +6 more
semanticscholar   +1 more source

Detection and quantification of synthetic cathinones and selected piperazines in hair by LC-MS/MS

Forensic Science, Medicine, and Pathology, 2019
André Niebel, F. Krumbiegel, S. Hartwig, M. Parr, M. Tsokos   +4 more
semanticscholar   +1 more source