111268-67-8Relevant articles and documents
SYNTHESIS OF 4-HALOTETRAHYDROPYRANS FROM ALLYLSILANES AND CARBONYL COMPOUNDS IN THE PRESENCE OF LEWIS ACIDS
Coppi, Laura,Ricci, Alfredo,Taddei, Maurizio
, p. 973 - 976 (1987)
An unexpected behaviour of the rection of allylsilanes and carbonyl compounds allowed the stereospecific preparation of differently substituted 4-halotetrahydropyrans with an "all cis" configuration.
One-pot allyl-/crotylboration-Prins cyclization of aldehydes
Veeraraghavan Ramachandran,Gagare, Pravin D.
, p. 4378 - 4381 (2011)
Multi-substituted tetrahydropyrans (THPs) have been prepared via a one-pot, In(OTf)3-catalyzed, sequential allyl-/crotylboration-Prins cyclization. The homoallylic borate intermediate formed during the allyl- and crotylboration was converted in
Direct synthesis of tetrahydropyrans via one-pot Babier-Prins cyclization of allylbromide with carbonyl compounds promoted by RTILs BPyX/SnX′2 or BBIMBr/SnBr2
Zhao, Xian-Liang,Liu, Li,Chen, Yong-Jun,Wang, Dong
, p. 7113 - 7120 (2006)
Tetrahydropyran compounds can be directly synthesized from allylbromide and carbonyl compounds by means of one-pot Babier-Prins cyclization promoted by BPyX/SnX′2 or BBIMBr/SnBr2 complex (functionalized RTILs) under solvent-free cond
The role ionic liquid [BMIM][PF6] in one-pot synthesis of tetrahydropyran rings through tandem barbier–prins reaction
Batista, Poliane K.,de Ferreira, Jo?o Marcos G.O.,Silva, Fabio P.L.,Vasconcellos, Mario L.A.A.,Vale, Juliana A.
, (2019/06/10)
Tetrahydropyran (THP) rings are common in several natural products, therefore, various strategies are being developed to synthesize these rings. The present work described the study of a one-pot synthesis of 2,4,6-trisubstituted tetrahydropyran compounds
Diastereoselective syntheses via Prins cyclization, crystal structures determination and theoretical studies of cis-2,6-diphenyl-4- hydroxytetrahydropyran and analogues
Silva,Sabino,Martins,Vasconcellos
, p. 478 - 487 (2013/03/29)
We report in this article the diastereoselective syntheses of tetrahydropyranyl derivatives 1-5, its cis configurational ascertainment by spectroscopy and finally the crystal structures determination that unequivocally shows the 1-5 configurations and its
Synthesis of a novel diarylheptanoid isolated from Zingiber officinale
Parker, Gregory D.,Seden, Peter T.,Willis, Christine L.
scheme or table, p. 3686 - 3689 (2009/10/04)
Syntheses of 4-acetoxy-2,6-disubstituted tetrahydropyrans via Prins cyclisation of homoallylic alcohols with benzylic aldehydes are described and the methodology is applied in the total synthesis of diarylheptanoid 1 confirming both the structure and abso
Synthesis of (-)-centrolobine by Prins cyclizations that avoid racemization.
Marumoto, Shinji,Jaber, James J,Vitale, Justin P,Rychnovsky, Scott D
, p. 3919 - 3922 (2007/10/03)
[formula: see text] The segment-coupling Prins cyclization avoids two of the problems common to other Prins cyclization protocols: side-chain exchange and partial racemization by reversible 2-oxonia Cope rearrangement. Model studies demonstrate the stereochemical fidelity of Prins cyclizations using alpha-acetoxy ethers compared with direct aldehyde-alcohol Prins reactions. Furthermore, we propose a mechanism for the racemization observed in some intermolecular Prins cyclizations. Two straightforward syntheses of optically pure (-)-centrolobine highlight the utility of Prins cyclizations.