Divergent Reaction of Allenoates: Synthesis of Polysubstituted Pyrazoles and N‐Alkylated Hydrazones DOI
Saideh Rajai‐Daryasarei,

Frank Röminger,

Hamid Reza Bijanzadeh

и другие.

Advanced Synthesis & Catalysis, Год журнала: 2022, Номер 364(21), С. 3657 - 3663

Опубликована: Сен. 21, 2022

Abstract A strategy for the divergent synthesis of polysubstituted pyrazoles and N ‐alkylated hydrazone derivatives through three‐component reaction aromatic aldehydes, aryl sulfonyl hydrazides, allenoates under mild conditions is described. Both products can be obtained by changing base. magnified image

Язык: Английский

Synthesis of Isoxazol-5(2H)-one Derivatives via (tBuO)2Mg Promoted [3 + 2] Annulations of δ-Acetoxy Allenoates with Hydroxylamine DOI
Shi Bai, Yu Zhang,

Siyan Miao

и другие.

The Journal of Organic Chemistry, Год журнала: 2024, Номер 89(11), С. 8291 - 8298

Опубликована: Май 28, 2024

Herein, an efficient (

Язык: Английский

Процитировано

1
Phosphine vs DBU-Catalyzed Annulation Reactions of β′-Acetoxy Allenoates with Acyl-Tethered Benzothiazole Bisnucleophiles: (4 + 3) or (4 + 1) vs (3 + 3) Annulation DOI
Sachin Chauhan, K. C. Kumara Swamy

The Journal of Organic Chemistry, Год журнала: 2024, Номер 89(15), С. 10816 - 10830

Опубликована: Июль 15, 2024

Dearomative annulation reaction of acyl-tethered benzothiazole bisnucleophiles with β'-acetoxy allenoates by switching the Lewis base is developed. The DBU-catalyzed gives benzothiazole-fused 1,4-dihydropyridine carboxylates (3 + 3) chemoselectively. By contrast, PR

Язык: Английский

Процитировано

1
Recent advances in phosphine-mediated sequential annulations DOI

Xuling Pan,

Wei Cai, You Huang

и другие.

Chinese Chemical Letters, Год журнала: 2024, Номер unknown, С. 110628 - 110628

Опубликована: Ноя. 1, 2024

Язык: Английский

Процитировано

1
DABCO-Catalyzed [4 + 2] Annulation of 5-Methylenehex-2-ynedioates with Electron-Deficient Alkenes DOI

Dongqiu Li,

Fang Cheng,

Yuhai Tang

и другие.

The Journal of Organic Chemistry, Год журнала: 2022, Номер 87(9), С. 6362 - 6370

Опубликована: Апрель 15, 2022

Herein, we describe a DABCO-catalyzed [4 + 2] annulation between 5-methylenehex-2-ynedioates and electron-deficient olefins to afford functionalized cyclohexadienes in good yields under mild conditions. The use of β- ε-carbons the substrates for C-C bond formation is distinct from previous reports showing substrate-controlled divergent reactivity. believed proceed domino cyclization initiated by cross Rauhut-Currier reaction.

Язык: Английский

Процитировано

6
Divergent Reaction of Allenoates: Synthesis of Polysubstituted Pyrazoles and N‐Alkylated Hydrazones DOI
Saideh Rajai‐Daryasarei,

Frank Röminger,

Hamid Reza Bijanzadeh

и другие.

Advanced Synthesis & Catalysis, Год журнала: 2022, Номер 364(21), С. 3657 - 3663

Опубликована: Сен. 21, 2022

Abstract A strategy for the divergent synthesis of polysubstituted pyrazoles and N ‐alkylated hydrazone derivatives through three‐component reaction aromatic aldehydes, aryl sulfonyl hydrazides, allenoates under mild conditions is described. Both products can be obtained by changing base. magnified image

Язык: Английский

Процитировано

6