3152-15-6Relevant articles and documents
Carbonylation of terminal alkynes using a multicatalytic system, Pd(II)/chlorohydroquinone/NPMoV, under carbon monoxide and dioxygen
Sakurai, Yasunori,Sakaguchi, Satoshi,Ishii, Yasutaka
, p. 1701 - 1704 (1999)
Carbonylation of terminal alkynes was performed using a new triple catalytic system, Pd(II)/chlorohydroquinone/NPMoV, under carbon monoxide and oxygen. For instance, phenylacetylene was converted into methyl phenylpropiolate (85%) in methanol and phenylmaleic anhydride (62%) in dioxane. The reaction did not take place in the absence of oxygen.
Expeditious synthesis of the marine natural products prepolycitrin a and polycitrins a and b through heck arylations
Canto, Karen,Da Silva Ribeiro, Rodrigo,Biajoli, Andre F. P.,Correia, Carlos Roque D.
, p. 8004 - 8013 (2014/01/06)
New, efficient protocols for the syntheses of the marine natural products prepolycitrin A as well as polycitrins A and B were developed by employing the Heck-Matsuda arylation of maleic anhydride or dimethyl fumarate with aryldiazonium tetrafluoroborates. Both symmetrical and unsymmetrical 3,4-diarylmaleic anhydrides were easily and effectively prepared. Efficient bromination reactions that employed tribromoisocyanuric acid provided access to the polycitrin family of compounds. Under microwave irradiation in the presence of tyramine, the corresponding maleimides were obtained in high yields from the brominated 3,4-diarylmaleic anhydrides. This methodology provided for the concise synthesis of prepolycitrin A and the total syntheses of the marine alkaloids polycitrins A and B in overall yields of 37 and 47 % from maleic anhydride and dimethyl fumarate, respectively. The efficient and concise syntheses of the marine natural products prepolycitrin A as well as polycitrins A and B were accomplished by using a Heck-Matsuda arylation of maleic anhydride with aryldiazonium tetrafluoroborates. Polycitrins A and B were synthesized in overall yields of 37 and 47 %, respectively. Copyright
Fungicidal agents containing pyrrolidones as their active agents and use thereof for treating plants
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, (2008/06/13)
Agrochemical compositions having fungicidal action and comprising as active compounds compounds of the formula I where R1is hydrogen, C1-C6-alkyl, C1-C6-alkylcarbonyl, formyl or C1-C6