METHOD FOR PRODUCING 2-ALKYLCARBONYLNAPHTHO[2,3-b]FURAN-4,9-DIONE-RELATED SUBSTANCE, AND SAID RELATED SUBSTANCE
申请人:Sumitomo Dainippon Pharma Co., Ltd.
公开号:US20190062294A1
公开(公告)日:2019-02-28
Provided is a method for producing a 2-alkylcarbonylnaphtho[2,3-b]furan-4,9-dione-related substance, which is suitable for the production on an industrial scale. The present invention provides: a method for producing an intermediate for the production of a 2-alkylcarbonyl[2,3-b]furan-4,9-dione, which comprises reacting a 1-butyne derivative in which a ketone or an alcohol is protected with a 2-hydroxy-1,4-naphthoquinone derivative having a leaving group at position-3 in a solvent in the presence of a metal or a metal compound and a base; and a substance relating to the intermediate.
Intramolecular Formal<i>anti</i>-Carbopalladation/Heck Reaction: Facile Domino Access to Carbo- and Heterooligocyclic Dienes
作者:Martin Pawliczek、Bastian Milde、Peter G. Jones、Daniel B. Werz
DOI:10.1002/chem.201502327
日期:2015.8.24
An intramolecular domino process consisting of a formal anti‐carbopalladation followed by Heck reaction is realized. Complex oligo(hetero)cyclic scaffolds are efficiently obtained in one synthetic step from easily obtainable enyne precursors. In contrast to common syn‐carbopalladation reactions of alkyne units, the carbopalladation employed here is designed to afford an anti‐arrangement of the two
Gold(I)-Catalyzed 1,3-<i>O</i>-Transposition Reactions: Ynesulfonamides to Ynamides
作者:De-Yao Li、Yin Wei、Min Shi
DOI:10.1002/ejoc.201500604
日期:2015.7
The gold-catalyzed 1,3-O-transpositionreaction of ynesulfonamides provides a practical synthetic protocol for the synthesis of ynamides under mild conditions. This is the first 1,3-O-transposition example of ynesulfonamides in which a heteroatom is attached to the alkynyl terminal. A plausible mechanism is been proposed on the basis of O-18-labeling and control experiments as well as DFT calculation
Lithium diorganocuprates add across the triple bond of substituted and non-substituted acetylenic acetals and ketals to give dialkenylcuprates, which can be decomposed into alkoxyallenes or may be trapped with a variety of electrophiles, such as alkyl, alkenyl, alkynyl and aryl halides. They may also undergo conjugate addition to α-βunsaturated esters and ketones. The method is used for the synthesis