3-(3-Butynyloxy)-and 3-(4-pentnyfoxy)-1,2,4-triazines undergo facile intramolecular Diels-Alder reactions to yield 2,3-dihydrofuro(2,3-@pyridines and dihydropyrano(2,3-&)pyridines respectively. The former are readily dehydrogenated with DDQ to furo(2,3\_l$pyridines.
Intramolecular reactions of 2-(azidobutyl)-1,4-benzoquinones. Unexpected rearrangement to a furo[3,4-b]indolizidine-2-one
✍ Scribed by Arthur G. Schultz; Wayne G. McMahon; Ronald R. Staib; Rudolph K. Kullnig
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- French
- Weight
- 205 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0040-4039
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📜 SIMILAR VOLUMES
Thiazine derivatives R 0610 Synthesis of a Novel Heterocyclic System: 2H-Furo[3,2-b][1,4]benzothiazin--2-one. -The cyclocondensation of o-aminothiophenols (I) with citraconic anhydride (II) proceeds with good regioselectivity to give the benzothiazepinones (IV). They can be readily cyclized to the t
J3a 8b 5.7-6.2Hz found in (?a) was in agreement with that found in panacene (~)l, consistent with the cis fusion of the furofuran rings.
## Abstract Reaction of 1,5‐benzodiazepin‐2,4‐dione with 3‐__O__‐substituted‐5,6‐anhydro‐1,2‐isopropylidene‐α‐D‐glucofuranose gave the unexpected __N,N'__‐di‐glucofuranosyl benzimidazol‐2‐one by a novel rearrangement and ring closure reaction. A mechanism is proposed.
## furo[2,3-b] pyridine Heterocycle a b s t r a c t The cycloalkeno [1,2-d]furo [2,3-b]pyridine skeleton was conveniently synthesized from fused 4-(2-cyanovinyloxy)butanenitriles in one step through sequential intramolecular Michael addition, b-elimination and intramolecular nucleophilic addition