Abstract In this study, 5-substituted and 5,6-disubstituted [4]acenes were synthesized by the double cationic cyclization of fluoroalkenes. (a) After being treated with Me2AlCl (1.2 equiv), 2-trifluoromethyl-1-alkenes bearing two aryl groups underwent domino Friedel–Crafts-type (two-ring construction) followed dehydrogenation to generate 5-fluorinated [4]acenes. The same (trifluoromethyl)alkene...

A MnI-catalyzed hydroboration of terminal alkenes and a 1,2-diboration alkynes with pinacolborane (HBPin) is described. For alkenes, anti-Markovnikov takes place; for the reaction proceeds excellent trans-1,2-selectivity. The most active pre-catalyst bench-stable alkyl bisphosphine MnI complex fac-[Mn(dippe)(CO)3(CH2CH2CH3)]. catalytic process initiated by migratory insertion CO ligand into Mn–...

the nanoparticles of ti-si mixed oxides (ntso) with rutile structure were prepared by sol-gel method in a mixture of alcohol and water as solvent. the solid product was characterized by xrd, ftir, sem, tem, uv, tga and laser raman spectroscopy. the catalytic activity of ntso (5-10 nm) was investigated in the epoxidation of cis stilbene, trans stilbene, and norbornene by using oxidants such as t...

We have demonstrated that iron porpholactones could be effective catalysts for nitrogen atom transfer reactions such as aziridination of alkenes and amidation of alkanes using organic azides.

Experimental and theoretical rationalization on regioselective mixed diboration of alkenes, with the unsymmetrical diboron reagent Bpin-Bdan, providing the protecting Bdan moiety in the internal position.

Starting from readily available phenanthrenequinone and alkenes, biaryl containing medium-ring bislactones could be easily prepared through sequential photocycloaddition-photooxidation reactions with good yields and diastereoselectivity.

Platinum(II) salts in combination with copper salts and molecular oxygen catalyse an unprecedented intramolecular transfer of heteroatoms to alkenes to yield aminooxygenation products under sustainable conditions.