Reactions of (2S)-1-Arenesulfonyl-2-alkanol Dianions with Aldehydes, Application to the Synthesis of Enantiomerically Pure (3S)-1-Alken-3-ols and (2E,4S)-4-Hydroxy-2-alkenenitriles
Chemoselectivity in the ruthenium-catalyzed redox isomerization of allyl alcohols
作者:Barry M. Trost、Robert J. Kulawiec
DOI:10.1021/ja00058a059
日期:1993.3
Adjustment of oxidation level by internalhydrogen reorganization represents a highly efficient synthetic protocol. Cyclopentadienylbis(triphenylphosphine)ruthenium chloride in the presence of triethylammonium hexafluorophosphate catalyzes the redox isomerization of allyl alcohols to their saturated aldehydes or ketones. High chemoselectivity is observed since simple primary and secondary alcohols
Copper-Catalyzed Perfluoroalkylation of Allyl Phosphates with Stable Perfluoroalkylzinc Reagents
作者:Lihua Liu、Xifei Bao、Hua Xiao、Junlan Li、Feifan Ye、Chaoqin Wang、Qinhua Cai、Shilu Fan
DOI:10.1021/acs.joc.8b02432
日期:2019.1.4
copper-catalyzed cross-coupling of allyl phosphates with stable perfluoroalkylzinc reagents has been developed. The reaction proceeds under mild reaction conditions with high efficiency, good functional group tolerance, and high regio- and stereoselectivities and provides general, straightforward, and useful access to allyl-perfluoroalkyl compounds. Preliminary mechanistic studies reveal that the allyl
An N-Heterocyclic Carbene (NHC) catalyzed biomimetic Stetterreaction was applied for the first time as a bioconjugation reaction to sensitive nucleoside-type biomolecules to provide original pyrrole linked nucleolipids. A versatile approach allowed the functionalization of thymidine at the three reactive positions (O-5′, O-3′ and N-3) providing a structural diversity oriented synthesis. This strategy
Synthesis of conjugated γ- and δ-lactones from aldehydes and ketones via a vinylation(allylation)-ring closing metathesis–oxidation sequence
作者:J.Alberto Marco、Miguel Carda、Santiago Rodrı́guez、Encarnación Castillo、Marı́a N. Kneeteman
DOI:10.1016/s0040-4020(03)00584-2
日期:2003.6
aldehydes and ketones followed by O-allylation of the obtained carbinols gave the corresponding allyl or homoallyl ethers, respectively. Ring-closing metathesis of these compounds afforded in many cases cyclic ethers (dihydrofurans and dihydropyrans, respectively) bearing disubstituted and trisubstituted CC bonds. These were then subjected to allylic oxidation to yield conjugated γ- and δ-lactones. Reasons
Highly regioselective homoallyl alcohol protection through ring opening of p-methoxybenzylidene acetal
作者:Yada Bharath、Spandana Maduri、Debendra K. Mohapatra
DOI:10.1016/j.tetlet.2016.10.068
日期:2016.11
highly regioselective homoallylic alcohol protection was achieved in the reductivecleavage of anisylidene acetal with DIBAL-H during the selective protection of hydroxyl group in terminal unsaturated diols which was unlikely compare to the diols present adjacent to internal and cyclic double bond. Reductivecleavage of terminal olefenic diols protected as its acetals gave exclusively allyl alcohol product