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Benzopyran
About: Benzopyran is a research topic. Over the lifetime, 1889 publications have been published within this topic receiving 15235 citations.
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Patent•
07 Feb 2013
TL;DR: In this paper, a substituted benzopyran derivative and the use thereof are discussed and the structure of the derivative has been found to be suitable for preparing drugs for treating psychotic conditions.
Abstract: Disclosed are a substituted benzopyran derivative and the use thereof The substituted benzopyran derivative has the structure of formula (I) It has been found in experiments that the derivative can be used to prepare drugs for treating psychotic conditions
TL;DR: In this paper, 3-Iodo-4-chalcogen-2 H -benzopyran derivatives underwent a direct Sonogashira cross-coupling reaction with several terminal alkynes in the presence of a catalytic amount of Pd(PPh 3 ) 2 Cl 2 with CuI as a co-catalyst, using Et 3 N as base and solvent.
Abstract: 3-Iodo-4-chalcogen-2 H -benzopyran derivatives underwent a direct Sonogashira cross-coupling reaction with several terminal alkynes in the presence of a catalytic amount of Pd(PPh 3 ) 2 Cl 2 with CuI as a co-catalyst, using Et 3 N as base and solvent. This cross-coupling reaction proceeded cleanly under mild conditions and was performed with propargylic alcohols, propargylic ethers, as well as alkyl and aryl alkynes, furnishing the correspondent 3-alkynyl-4-chalcogen-2 H -benzopyrans in good yields.
TL;DR: Les substitutions nucleophiles des chromannes du titre avec le [cyano trimethyl] silane sont etudiees as mentioned in this paper, and le catalyseur, TiCl 4 ou SnCl 4, a une influence sur la regioselectivite des reactions
Abstract: Les substitutions nucleophiles des chromannes du titre avec le [cyano trimethyl] silane sont etudiees. Le catalyseur, TiCl 4 ou SnCl 4 , a une influence sur la regioselectivite des reactions