G.-L. Gu, M. Lu, and R.-R. Tang, "Application of wittig reaction in synthesis of novel pyridine dicarboxylic acid derivatives with high ligand activity," Synthetic Communications, vol. 41, no. 22, pp. 3403-3408, 2011.G.L. Gu, and M. Lu, "Application of Wittig reaction in ...
Branched-chain 2-deoxy sugars. V. Application of the Wittig reaction to methyl 3,4-O-isopropylidene-β-D-erythro-pentopyranosid-2-ulose and attempted synthesis of nucleosides of 2-deoxy-2-C-methylpentosesOxidation of methyl 3,4-O-isopropylidene-β-D-arabinopyranoside (1) with ruthenium ...
SYNTHESIS OF 4-SUBSTITUTED (6-HYDROXY-2-HEXEN-1-YL)-DIPHENYLPHOSPHIN OXIDES AND THEIR APPLICATION TO THE HORNER-WITTIG REACTION(2-Hydroxy-3-alkene-1-yl)diphenylphosphine oxides(5-carbetoxy-2-alkene-1-yl) diphenylphosphine oxides(6-hydroxy-2-alkene-1-yl)diphenylophosphine oxides...
Adding 2-iodoxybenzoic acid, oleanolic acid was oxidated to 12a, which was then converted to 12b–d via Corey–Bakshi–Shibata pyrrolidine catalystic reduction, Wolff-Kishner reduction, and Wittig reaction, respectively. Esterification and etherification of 1 at 3-position were relatively mo...
Resolution of (S,aS,S)-bipheny bisoxazoline complex through chelation-induced process. Full size image Enantioselective copper-catalyzed allylic C-H bond oxidation of olefins with peresters (Kharasch–Sosnovsky reaction) has been known as a powerful strategy to prepare chiral allylic esters by intr...
[0110] As represented by the following synthesis scheme (A), by reacting benzyltriphenylphosphonium salt (α1) whose 4-position is halogenated with benzaldehydes (β1) under the presence of a base, so-called, Wittig reaction, a stilbene derivative (St1) whose 4-position is halogenated is ...
Later, they employed this palladium-catalyzed arene-norbornene annulation reaction for the preparation of [3]naphthylenes (Scheme 3).25 They used different substitution patterns on the dibromonaphthalene to access to the linear, angular, and bent [3]naphthylenes. Interestingly, the optoelectronic prope...
Table 1 The optimization of intramolecular Michael addition/Wittig reaction From the results listed in Table1, the catalysts were found to have a significant influence on the enantioselectivities of the Michael reaction. ProlineCat. 1failed to promote this process (Table1, entry 1), while its de...
ChemInform Abstract: PREPARATION OF CONJUGATED DIENES BY WITTIG REACTION WITH 2‐ACYL‐5,6‐DIHYDRO‐4H‐PYRANS. APPLICATION TO DIENE SYNTHESISpyran derivativesAus den Acyl-dihydropyranen (I) wurden durch die Wittig-Reaktion mit Triphenylmethylphosphoniumbromid die Diene (II) dargestellt.doi:10.1002/...
. In the presence of a strong base such as pyridine, the reagent is functionally equivalent to “Cp2Ti═CH2”. These Ti-based catalysts are typically not nearly as active or tolerant of carbonyl functionalities as the later catalysts, but these Ti complexes undergo stoichiometric Wittig-like ...