One-Step, Effective, and Cascade Syntheses of Highly Functionalized Cyclopentenes with High Diastereoselectivity
作者:Suman Alishetty、Hong-Pin Shih、Chien-Chung Han
DOI:10.1021/acs.orglett.8b00510
日期:2018.5.4
Tetrabutylammoniumfluoride works as an effective organocatalyst for the cycloaddition between phenacylmalononitriles and electron-deficient olefins (having substituent groups of NO2, CHO, and COR), providing a facile synthetic route to versatile multifunctionalized cyclopentenes having an allylic quaternary carbon center bearing both cyano and carboxamide groups with high yields and high diastereoselectivity
The present invention provides a production method of a sulfonylpyrrole compound useful as a pharmaceutical product, a production method of an intermediate used for the method, and a novel intermediate. The present invention relates to a method of producing sulfonylpyrrole compound (VIII), which includes reducing compound (III) and hydrolyzing the reduced product to give compound (IV), subjecting compound (IV) to a sulfonylation reaction to give compound (VI), and subjecting compound (VI) to an amination reaction.
Substrate-controlled, PBu<sub>3</sub>-catalyzed annulation of phenacylmalononitriles with allenoates enables tunable access to cyclopentenes
作者:Narendra Kumar Vaishanv、Sanoop P Chandrasekharan、Mohd Khalid Zaheer、Ruchir Kant、Kishor Mohanan
DOI:10.1039/d0cc04688d
日期:——
phenacylmalononitriles with allenoates, controlled by the γ-substitution on allenoates, offers a tunable synthesis of multifunctionalized cyclopentene carboxamides and cyclopentenols. An unprecedented formation of cyclopentene carboxamide was observed when allenic esters bearing a substitution at the γ-position were employed, while unsubstituted allenoates produced cyclopentenols. The former reaction likely involves
Visible-Light-Mediated Synthesis of Thio-Functionalized Pyrroles
作者:Ashish Kumar Sahoo、Amitava Rakshit、Anjali Dahiya、Avishek Pan、Bhisma K. Patel
DOI:10.1021/acs.orglett.2c00283
日期:2022.3.18
An inimitable illustration of the green-light-induced synthesis of thio-functionalized pyrroles has been established using β-ketodinitriles and thiophenols as the reacting partners and eosin Y as the photocatalyst. Large-scale synthesis and some useful synthetic modifications of the thio-functionalized pyrroles are also demonstrated.
已经使用 β-酮二腈和苯硫酚作为反应伙伴,曙红 Y 作为光催化剂,建立了绿光诱导合成硫代官能化吡咯的独特说明。还展示了硫代官能化吡咯的大规模合成和一些有用的合成修饰。
Pd(II)-Catalyzed Synthesis of Furo[2,3-<i>b</i>]pyridines from β-Ketodinitriles and Alkynes via Cyclization and N–H/C Annulation
作者:Amitava Rakshit、Hirendra Nath Dhara、Ashish Kumar Sahoo、Tipu Alam、Bhisma K. Patel
DOI:10.1021/acs.orglett.2c01472
日期:2022.5.27
A Pd(II)-catalyzed synthesis of furopyridines has been developed from β-ketodinitriles and alkynes via an unusual N–H/C annulation. The participation of both the nitrile groups and the concurrent construction of furan and pyridine rings through the formation of C–C, C═C, C–O, C–N, and C═N bonds are the important features. The synthetic applicability is further demonstrated through a series of postsynthetic