- Design, synthesis and herbicidal activity of novel cyclic phosphonates with diaryl ethers containing pyrimidine
-
Thirteen novel cyclic phosphates were rationally designed and synthesized by introducing diary ethers containing pyrimidine. All the target compounds were characterized by 1H, 13C, 31P NMR and HRMS. The test of herbicidal activity indicated that most of the compounds showed good herbicidal activities against Amaranthus retroflexus. The compounds IA-2 (1-(5,5-dimethyl-2-oxido-1,3,2-dioxaphosphinan-2-yl)propyl-2-((4,6-dimethoxypyrimidin-2-yl)oxy)benzoate) and IA-3 ((5,5-dimethyl-2-oxido-1,3,2-dioxaphosphinan-2-yl)(phenyl)methyl-2-((4,6-dimethoxypyrimidin-2-yl)oxy)benzoate) exhibited remarkable post-emergency herbicidal activity against the tested monocotyledonous weed at the dosage of 112.5 g ai/ha.
- Zhang, Shasha,Guo, Xinjuan,Zhou, Yuan,Yang, Yalan,Peng, Hao,He, Hongwu
-
p. 1158 - 1163
(2019/07/04)
-
- Synthesis and anticancer activity of new class of bisphosphonates/phosphanamidates
-
Novel bis-heterocyclic bisphosphonates/phosphonamidates were synthesized utilizing the Pudovick reaction. The employment of Nb2O5 as catalyst was found to increase the yields and purity of the bisbenzoxazaphosphine derivatives (13a-h). Their anticancer activity studies in vitro, on three human tumor cell lines NCI-H460 (lung large cell), MCF-7 (breast adenocarcinoma), and SF-268 (central nervous system glioblastoma), showed that bis-[3-(3-chloro-4-fluorophenyl)-2-oxo-3,4-dihydro-2H-2λ5-benzo[e][1,3,2]oxazaphosphinin-2-yl]arylmethanes (13a-h) and [(4-chlorophenyl)-(hydroxyamidophosphinoyl)-methyl]phosphonic acid (14) exhibited significant anticancer activity.
- Kiran,Devendranath Reddy,Gunasekar,Suresh Reddy,Leon, Annette,Barbosa, Luiz C.A.
-
p. 885 - 892
(2008/09/20)
-
- Synthesis of new α-hydroxy-, α-halogeno- and vinylphosphonates derived from 5,5-dimethyl-1,3,2-dioxaphosphinan-2-one
-
Several α-hydroxyphosphonates have been prepared by the Pudovik reaction of the cyclic phosphite 5,5-dimethyl-1,3,2-dioxaphosphinan-2-one with aldehydes and β-oxo aldehydes. These can be readily converted to α-chloro- or α-bromophosphonates in excellent yield by simply treating them with thionyl chloride or bromide. Reaction with phosphorus triiodide gave α-iodophosphonates and α-hydridophosphonates. The Pudovik products obtained from β-oxo aldehydes can be readily dehydrated to give vinylphosphonates.
- Kumaraswamy, Sudha,Selvi, R. Senthamizh,Swamy, K. C. Kumara
-
p. 207 - 212
(2007/10/03)
-