1,n-Dicarbanionic Titanium Intermediates from Monocarbanionic Organometallics and Their Application in Organic Synthesis

OG Kulinkovich, A de Meijere - Chemical Reviews, 2000 - ACS Publications
Among the wide variety of organometallic compounds, the relatively cheap and safely
handled nontransition-metal derivatives, in particular organolithium, organomagnesium …

Synthesis of organotitanium complexes from alkenes and alkynes and their synthetic applications

F Sato, H Urabe, S Okamoto - Chemical Reviews, 2000 - ACS Publications
Transformations using organometallic complexes have played a central role in modern
organic synthesis. The types of reactions based on organometallic complexes can be …

Synthetic transformations mediated by the combination of titanium (IV) alkoxides and grignard reagents: selectivity issues and recent applications. Part 1: reactions of …

A Wolan, Y Six - Tetrahedron, 2010 - Elsevier
The present review deals with the chemistry of the organotitanium species formed by the
reaction of titanium alkoxides of the form XTi (OR) 3 (X¼Me, Cl, OR; R¼alkyl) and excess …

Leveraging the Halo-Nazarov Cyclization for the Chemodivergent Assembly of Functionalized Haloindenes and Indanones

C Holt, G Alachouzos, AJ Frontier - Journal of the American …, 2019 - ACS Publications
In this report, we describe a halo-Prins/aryl halo-Nazarov cyclization strategy that employs
readily available starting materials, inexpensive reagents, and convenient reaction …

Synthesis and chemistry of titanacyclopentane and titanacyclopropane rings supported by aryloxide ligation

MG Thorn, JE Hill, SA Waratuke… - Journal of the …, 1997 - ACS Publications
Treatment of the titanacyclopentadiene compound [Ti (OC6H3Ph2-2, 6) 2 (C4Et4)](3)(
OC6H3Ph2-2, 6= 2, 6-diphenylphenoxide) with olefins leads to the formation of a variety of …

The Divalent Titanium Complex Ti(O‐i‐Pr)4/2 i‐PrMgX as an Efficient and Practical Reagent for Fine Chemical Synthesis

F Sato, S Okamoto - Advanced Synthesis & Catalysis, 2001 - Wiley Online Library
This account describes synthetic transformations of unsaturated hydrocarbons, such as
alkynes, alkenes, and dienes, mediated by the divalent titanium reagent Ti (O‐i‐Pr) 4/2 i …

The Kulinkovich cyclopropanation of carboxylic acid derivatives

JK Cha, OG Kulinkovich - Organic Reactions, 2004 - Wiley Online Library
Cyclopropanes are characterized by high ring‐strain energy and have been employed as
useful building blocks in organic synthesis. The incorporation of a heteroatom donor …

New Lewis-acidic molybdenum (II) and tungsten (II) catalysts for intramolecular carbonyl ene and prins reactions. Reversal of the stereoselectivity of cyclization of …

P Kočovský, G Ahmed, J Šrogl… - The Journal of …, 1999 - ACS Publications
New Mo (II) complexes BnEt3N+ [Mo (CO) 4ClBr2]-(A) and Mo (CO) 5 (OTf) 2 (B) and their W
(II) congeners D and E have been developed as catalysts for the title reactions. Unlike other …

Ti (II)-mediated allenyne cyclization as a new tool for generation of chiral organotitanium compounds. Asymmetric generation of cyclic allyltitanium reagents with no …

H Urabe, T Takeda, D Hideura… - Journal of the American …, 1997 - ACS Publications
Treatment of a variety of 1, 2-dien-7-ynes with a slight excess of (η2-propene) Ti (Oi-Pr) 2
(1), prepared in situ from Ti (Oi-Pr) 4 and 2 equiv of i-PrMgCl in ether, afforded 1-alkenyl-2 …

Efficient and Practical Method for Synthesizing N-Heterocyclic Compounds Using Intramolecular Nucleophilic Acyl Substitution Reactions Mediated by Ti(O-i-Pr)4/2i …

S Okamoto, M Iwakubo, K Kobayashi… - Journal of the American …, 1997 - ACS Publications
Treatment of N-(2-or 3-alkynyl) amino esters with a low-valent titanium reagent diisopropoxy
(η2-propene) titanium (1), generated in situ by the reaction of Ti (Oi-Pr) 4 and 2 i-PrMgCl …