Aerobic oxidative synthesis of quinazolinones and benzothiazoles in the presence of laccase/DDQ as a bioinspired cooperative catalytic system under mild conditions
study applied laccase/DDQ as a bioinspired cooperative catalyticsystem for the synthesis of quinazolinones (80–95% yield) and benzothiazoles (65–98% yield) using air or O2 as ideal oxidants in aqueous media at ambient temperature. The aerobicoxidative cyclization reactions occur in two steps: (i) chemical cyclization; (ii) chemoenzymatic oxidation. These methods are more environment-friendly, efficient
目前的研究将漆酶/DDQ 作为一种受生物启发的协同催化系统,在环境温度下使用空气或 O 2作为水介质中的理想氧化剂合成喹唑啉酮(80-95% 产率)和苯并噻唑(65-98% 产率)。好氧氧化环化反应分两个步骤进行: (i) 化学环化;(ii) 化学酶氧化。由于使用O 2作为氧化剂,漆酶作为生态友好的生物催化剂,水性介质作为溶剂,并且不含任何有毒的过渡金属和卤化物,这些方法比其他报道的方法更环保、高效、简单和实用。催化剂。因此,这些方法可以应用于制药和其他敏感的合成过程。
Room Temperature Anhydrous Suzuki–Miyaura Polymerization Enabled by C−S Bond Activation
cross-coupling reaction between (hetero)aryl boronic esters and arylsulfides was explored, of which universality was exemplified with thirty small molecules and twelve alternating conjugated polymers. Mechanism studies revealed the importance of room temperature and anhydrous condition in reducing the homocoupling defects and enhancing the optoelectronic properties of the conjugated polymers.
A Simple and Efficient Synthesis of (Hetero)Aryl-Substituted Benzothiazolyl or Benzoxazolyl Furan, Thiophene and N-methylpyrrole Derivatives through a Palladium-Catalyzed Regioselective C–H Bond Arylation
作者:Hamed Ben Ammar、Henri Doucet、Fatma Abdellaoui、Chiraz Youssef、Jean-François Soulé
DOI:10.1055/s-0034-1379021
日期:——
The synthesis of 2-(hetero)aryl-5-benzothiazol-2-yl or -benzoxazol-2-ylfuran, -thiophene, and -1-methylpyrrole derivatives was accomplished in two steps. 2-(Benzothiazol-2-yl)- or 2-benzoxazol-2-ylfuran, -thiophene, or -1-methylpyrrole were synthesized by coupling a heteroaryl aldehyde and either 2-mercaptophenol or 2-aminophenol. Then, they were successfully arylated with a wide range of aryl bromides using a phosphine-free palladium protocol; regioselective arylation at C5 of furan, thiophene, or 1-methyl-1H-pyrrole was observed in all cases. This reaction tolerates a wide variety of substituents on the aryl bromides as well as heteroaryl bromides.
FISER-JAKIC L.; KARAMAN B.; JAKOPCIC K., CROAT. CHEM. ACTA, 1980, 53, NO 1, 69-79
作者:FISER-JAKIC L.、 KARAMAN B.、 JAKOPCIC K.
DOI:——
日期:——
FISER-JAKIC, L.;JAKOPCIC, K., CROAT. CHEM. ACTA, 1981, 54, N 2, 245-248