Synthesis of Seleno‐Heterocycles via Electrophilic/Radical Cyclization of Alkyne Containing Heteroatoms

Advanced Synthesis & Catalysis, Год журнала: 2020, Номер 362(17), С. 3485 - 3515

Опубликована: Июнь 22, 2020

Abstract containing heterocyclic scaffolds by virtue of their interesting reactivities and a broad range applications in the medicinal materials chemistry. This review involves electrophilic/radical cyclization alkynes heteroatoms which resulted into novel Se‐heterocycles. The synthesis seleno‐heterocycles via different nucleophiles including O , N S Se Te C‐ is exhaustively discussed. Also, one‐pot electrophilic 1,3‐diynes 1,3,5‐triynes was described details. Furthermore, various mechanisms underlying selenium‐β‐lactam, carbapenem heterocycle, bis‐ tris‐selenide alkene, β‐selenosulfonation selenated were Se‐heterocycles reported this allow preparing these compounds bearing selenium moiety both on rings (outside) inside ring (e. g. selenophenes). demonstrates growing opportunities to construct heterocycles from heteroatoms. magnified image

Язык: Английский

---

AgBF₄-catalyzed deoxygenative C2-amination of quinoline N-oxides with isothiocyanates

Organic Chemistry Frontiers, Год журнала: 2018, Номер 6(2), С. 167 - 171

Опубликована: Ноя. 16, 2018

A general, effective and convenient protocol for the direct synthesis of various 2-aminoquinolines (39 examples) through AgBF₄-catalyzed amination quinoline N-oxides with isothiocyanates under base-, oxidant-free mild conditions was developed.

Язык: Английский

---

Metal- and Solvent-Free Ultrasonic Multicomponent Synthesis of (Z)-β-Iodo Vinylthiocyanates

ACS Sustainable Chemistry & Engineering, Год журнала: 2018, Номер 7(1), С. 1574 - 1579

Опубликована: Дек. 4, 2018

An eco-friendly and practical method for the ultrasonic multicomponent synthesis of diverse (Z)-β-iodo vinylthiocyanates from cheap commercially available alkynes, molecular iodine, KSCN through an intermolecular H-bonding assistance strategy was developed.

Язык: Английский

---

Catalyst-Free Organic Transformations under Visible-Light

ACS Sustainable Chemistry & Engineering, Год журнала: 2021, Номер 9(12), С. 4296 - 4323

Опубликована: Март 16, 2021

Pollutants from industry and chemical laboratories have harmful effects on human health the environment. Concerns about this problem led to development of more versatile sustainable protocols based principles green chemistry. One these innovative approaches is carry out reactions under visible-light sources without photocatalysts. This benign, simple, cost-effective method, inspired by nature, could be a suitable alternative some classical methods, change harsh reaction conditions into milder ones. In Perspective, we outlined results catalyst-free organic further encourage researchers in promising field. The proposed mechanisms generation an electron donor–acceptor complex (EDA) single-electron transfer (SET) pathway were discussed.

Язык: Английский

---

Recent applications of radical cascade reaction in the synthesis of functionalized 1-indenones

Chinese Chemical Letters, Год журнала: 2019, Номер 30(7), С. 1361 - 1368

Опубликована: Март 22, 2019

Язык: Английский

---

Transition-metal- and oxidant-free directed anodic C–H sulfonylation of N,N-disubstituted anilines with sulfinates

Chemical Communications, Год журнала: 2019, Номер 55(61), С. 8995 - 8998

Опубликована: Янв. 1, 2019

A new, practical directed anodic C–H sulfonylation of N,N-disubstituted anilines with sodium sulfinates for producing o- or p-amino arylsulfones and diarylsulfones is described.

Язык: Английский

---

Synthesis of β-Sulfonyl Amides through a Multicomponent Reaction with the Insertion of Sulfur Dioxide under Visible Light Irradiation

Organic Letters, Год журнала: 2019, Номер 21(6), С. 1935 - 1938

Опубликована: Март 6, 2019

A multicomponent reaction of styrenes, aryldiazonium tetrafluoroborates, sulfur dioxide, nitriles, and water in the presence a photocatalyst at room temperature is performed. This vicinal aminosulfonylation styrenes with insertion dioxide under visible light irradiation proceeds efficiently excellent chemoselectivity, giving rise to corresponding β-sulfonyl amides moderate good yields.

Язык: Английский

---

Clean Preparation of Quinolin-2-yl Substituted Ureas in Water

ACS Sustainable Chemistry & Engineering, Год журнала: 2019, Номер 7(7), С. 7193 - 7199

Опубликована: Март 8, 2019

An environmentally-friendly method for the clean preparation of various quinolin-2-yl substituted ureas in water under mild and toxic reagent-, base-, organic solvent-free conditions was established. In large-scale synthesis, products could be rapidly collected via simple filtration washing with ethanol. The usage readily available raw materials, 100% atom economy, high yield, excellent regioselectivity enhanced practicability this protocol.

Язык: Английский

---

An unexpected reaction of aryldiazonium tetrafluoroborates, sodium metabisulfite, and thiourea under photoinduced conditions

Organic Chemistry Frontiers, Год журнала: 2019, Номер 6(11), С. 1863 - 1867

Опубликована: Янв. 1, 2019

A photoinduced synthesis of S-aryl thiosulfonates through a three-component reaction aryldiazonium tetrafluoroborates, sodium metabisulfite, and thiourea is achieved. In this transformation, radical coupling pathway proposed.

Язык: Английский

---

Selenium-catalyzed oxidation of alkenes: insight into the mechanisms and developing trend

Catalysis Science & Technology, Год журнала: 2020, Номер 10(10), С. 3113 - 3121

Опубликована: Янв. 1, 2020

Recent progresses of the selenium-catalyzed oxidation alkenes are summarized at mechanism level. It may be beneficial for designing novel selenium-containing catalysts and alkene protocols next phase studies.

Язык: Английский

---