Functionalization of Chromenes and Their Derivatives DOI Open Access
Laura Cunningham, Sundaravel Vivek Kumar, Patrick J. Guiry

и другие.

Опубликована: Март 25, 2023

Chromenes and their derivatives are abundant in natural products biologically active molecules. Here we summarize the decades-long development of transition metal-catalyzed site-selective C–H functionalization chromene derivatives. This chapter describes 2 H -chromenes, -chromen-2-ones (coumarins), 4 -chromenes -chromen-4-ones (chromones).

Язык: Английский

Coumarin-3-carboxylic acid: C3/C4-functionalizations and cyclization reactions DOI
Fatemeh Doraghi,

Mehdi Ghanbarlou,

Amir Mohammad Mahdavian

и другие.

Journal of Chemical Sciences, Год журнала: 2024, Номер 136(2)

Опубликована: Май 28, 2024

Язык: Английский

Процитировано

0
Regioselective alkenylation of masked carboxylic acid derivatives of coumarins with acrylates via oxidative C(sp2)–C(sp2) cross-coupling DOI

Kalakonda Raga Chaitanya,

Srinivas Ambala,

Bheeshma Geetanjali Kodiripaka

и другие.

New Journal of Chemistry, Год журнала: 2024, Номер 48(47), С. 19742 - 19745

Опубликована: Янв. 1, 2024

Regio-selective C–H alkenylation reaction with acrylates by a rhodium-catalyzed of PMS (phenylmethyl sulfoximine) directed 2-oxo-2 H -chromene-3-carboxylic acid derivatives.

Язык: Английский

Процитировано

0
Site‐Selective Pd‐Catalysed Fujiwara‐Moritani type Reaction of N,S‐Heterocyclic Systems with Olefins DOI

Fanny Danton,

Riham Najjar,

Mohamed Othman

и другие.

Advanced Synthesis & Catalysis, Год журнала: 2020, Номер 363(4), С. 1088 - 1095

Опубликована: Ноя. 26, 2020

Abstract Dihydro‐1,4‐thiazine skeletons bearing olefin fragment at their α‐position were prepared through a Pd(OAc) 2 ‐catalysed Fujiwara‐Moritani type reaction via C−H alkenylation with olefins. This approach is selective, generalizable to wide range of olefins and requires only 1 eq. Ag CO 3 without the need co‐oxidant. The bond activation proved be strongly dependent on olefin's substitution while unfused dihydro‐1,4‐thiazines seemed affected by oxidation state sulfur atom. utility obtained was demonstrated implication in dipolar cycloaddition non‐stabilized azomethine ylide. magnified image

Язык: Английский

Процитировано

3
Rhodium(iii)-catalyzed synthesis of trisubstituted furans via vinylic C–H bond activation DOI
Mahadev Sharanappa Sherikar, Kiran R. Bettadapur, Veeranjaneyulu Lanke

и другие.

Organic & Biomolecular Chemistry, Год журнала: 2021, Номер 19(34), С. 7470 - 7474

Опубликована: Янв. 1, 2021

A simple method for the synthesis of trisubstituted furans has been disclosed using an Rh( iii )-catalyst by C vinyl –H bond activation, with silver salt Ag( i ) is playing a dual role – halide scavenger and Lewis acid catalyst promoting Paal–Knorr type cyclization.

Язык: Английский

Процитировано

3
Functionalization of Chromenes and Their Derivatives DOI Open Access
Laura Cunningham, Sundaravel Vivek Kumar, Patrick J. Guiry

и другие.

Опубликована: Март 25, 2023

Chromenes and their derivatives are abundant in natural products biologically active molecules. Here we summarize the decades-long development of transition metal-catalyzed site-selective C–H functionalization chromene derivatives. This chapter describes 2 H -chromenes, -chromen-2-ones (coumarins), 4 -chromenes -chromen-4-ones (chromones).

Язык: Английский

Процитировано

0