63494-84-8Relevant academic research and scientific papers
Sodium hypochlorite-mediated synthesis of 2,5-disubstituted 1,3,4-oxadiazoles from hydrazides and aldehydes
Paidi, Karuna Raman,Kolli, Murali Krishna,Reddy, Eeda Koti,Pedakotla, Venkata Ramana
, p. 371 - 376 (2020/05/04)
[Figure not available: see fulltext.] A simple and convenient method for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles has been developed. Structurally divergent symmetrical and unsymmetrical 2,5-disubstituted 1,3,4-oxadiazoles can be obtained in moderate to high yields via NaOCl-mediated oxidative cyclization of N-acylhydrazones, generated in situ from aliphatic and aromatic hydrazides and aldehydes.
Tin Powder-Promoted One-Pot Construction of α-Methylene-γ-lactams and Spirolactams from Aldehydes or Ketones, Acylhydrazines, and 2-(Bromomethyl)acrylate
Xu, Yanli,Huang, Danfeng,Wang, Ke-Hu,Ma, Junyan,Su, Yingpeng,Fu, Ying,Hu, Yulai
, p. 12224 - 12233 (2016/01/09)
A concise and efficient method for the synthesis of α-methylene-γ-lactams is developed from multicomponent one-pot reactions of aldehydes or ketones, hydrazides, and ethyl 2-(bromomethyl)acrylate promoted by tin powder. The reaction proceeds smoothly under mild reaction conditions without using any catalyst to give the corresponding products in high yields. α-Methylene-γ-spirolactams can also be prepared from cyclic ketones.
I2-mediated oxidative C-O bond formation for the synthesis of 1,3,4-oxadiazoles from aldehydes and hydrazides
Yu, Wenquan,Huang, Gang,Zhang, Yueteng,Liu, Hongxu,Dong, Lihong,Yu, Xuejun,Li, Yujiang,Chang, Junbiao
, p. 10337 - 10343 (2013/11/06)
A practical and transition-metal-free oxidative cyclization of acylhydrazones into 1,3,4-oxadiazoles has been developed by employing stoichiometric molecular iodine in the presence of potassium carbonate. The conditions of this cyclization reaction also work well with crude acylhydrazone substrates obtained from the condensation of aldehydes and hydrazides. A series of symmetrical and asymmetrical 2,5-disubstituted (aryl, alkyl, and/or vinyl) 1,3,4-oxadiazoles can be conveniently generated in an efficient and scalable fashion.
Studies on the synthesis of 2-alkyl-5-aryl-1,3,4-oxadiazolines from N-acylhydrazones
Marqués-López, Eugenia,Díez, Elena,Martín-Zamora, Eloísa,álvarez, Eleuterio,Fernández, Rosario,Lassaletta, José M.
supporting information; experimental part, p. 885 - 888 (2012/05/20)
Reaction of N-acylhydrazones with benzyloxyacetyl chloride in the presence of i-Pr2EtN affords new 1,3,4-oxadiazolines in excellent yields (72-95%), under mild reaction conditions and in short reaction times. The structures of the products were confirmed by single-crystal X-ray diffractometry. A plausible reaction mechanism is proposed. Georg Thieme Verlag Stuttgart · New York.
Asymmetric Br?nsted acid catalyzed cycloadditions-efficient enantioselective synthesis of pyrazolidines, pyrazolines, and 1,3-diamines from N-acyl hyrazones and alkenes
Rueping, Magnus,Maji, Modhu Sudan,Kü?ük, Hatice Ba?pínar,Atodiresei, Iuliana
supporting information, p. 12864 - 12868 (2013/02/22)
A general, metal-free, highly enantioselective Bronsted acid catalyzed [3+2] cycloaddition between hydrazones and alkenes has been developed that affords pyrazolidine derivatives (see scheme). The resulting optically active pyrazolidines can undergo many chemical transformations which allow, for example, the enantioselective synthesis of valuable pyrazolines and 1,3-diamines. Copyright
Hydrophosphonylation of benzoylhydrazones using iodine as a catalyst: A facile synthesis of α-(N′-acylhydrazino)-substituted phosphonates
Das, Biswanath,Kumar, Jayprakash Narayan,Kumar, Avula Satya,Kanth, Boddu Shashi
experimental part, p. 3113 - 3116 (2010/11/02)
A simple and efficient method for the synthesis of α-(N′- acylhydrazino)-substituted phosphonates has been developed using the hydrophosphonylation of benzoylhydrazones with triethyl phosphite in the presence of iodine as a catalyst at room temperature. The products are formed in excellent yields (89-95%) within two to three hours. Georg Thieme Verlag Stuttgart - New York.
