Home
→
Browsing by Author

Browsing by Author "Khotinen A."

Now showing items 1-8 of 8

An efficient synthesis of 4-dimethoxyphosphonyl substituted pyrazoles and pyrazoline-5-ones

Khotinen A.; Polozovf A. (1993)

2-Dimethoxyphosphonyl-1, 3-dicarbonyl compounds (1a-c) were used for the synthesis of 4-dimethoxyphosphonyl substituted pyrazoles (2a-e) and pyrazoline-5-ones (5a-c). Intermediate hydrazones (3b, c) were also isolated. 5a ...
Dioxaphosphorinane chair to half-chair conversion caused by cis- to trans-enol transformation of the β-ketoester substituent

Polozov A.; Litvinov I.; Kataeva O.; Stolov A.; Yarkova E.; Khotinen A.; Klimovitskii E. (1995)

The X-ray single crystal structure 5,5-dimethyl-2-(methoxycarbonyl-3′-oxo-2′-butyl)-2-oxo-1,3,2-dioxaphosphorinane (I) reveals an unusual half-chair conformation of the dioxaphosphorinane substituent on a trans-enol ring. ...
Equilibrium CH-acidities of dimethyl 2-dimethoxyphosphoryl malonate and its thiophosphoryl analog

Polozov A.; Antipin I.; Gareev R.; Khotinen A.; Konovalov A. (1993)

The p Ka values of dimethyl 2-dimethoxyphosphoryl malonate and of its thiophosphoryl analog have been measured by transmetallation using the inclusion complex of Li+ with [2.1.1]-cryptand as the metallation agent. © 1994 ...
Extremely strong OH⋯O hydrogen bonds in some 3-organophosphorus substituted pentane-2,4-diones

Polozov A.; Khotinen A.; Klimovitskii E.; Kataeva O.; Litvinov I. (1992)

Single crystal X-ray analysis showed that 2-(2′,4′-dioxo-3′-pentyl)-trans,trans-4,6-dimethyl-2-oxo-1,3,2-dioxaphosphorinane (I) exists in the enol form, exhibiting hydrogen bonding with an R(O⋯O) of 2.397 Å. X-ray and NMR ...
Insertion of carbenes into p-h bonds. 5. f synthesis of new phosphonates and phosphinates in reactions catalysed by cu, pd, rh, ni complexes

Polozov A.; Mustaphin A.; Khotinen A. (1992)

Cu(OTf)2 and Cu(acac)2 were found to be the most effective catalysts in the reaction of diazo compounds Ph2CN2 (1a), EtOC(O)CHN2 (lb), MeOC(O)CHN2 (1c), MeC(0)CN2C(O)OMe (1d), Cl-CH2C(O)CHN2 (1e) and CH2N2 (1f) with ...
Kinetics of Conformer Reactions. I. A New Approach

Klimovitskii E.; Shtyrlin Y.; Kashaeva E.; Kiselev V.; Vafina R.; Khotinen A. (1996)

A new approach to determination of partial rate constants for reactions of conformers is developed on the basis of constituents of the Gibbs energy of activation for reactions of a series of conformationally heterogeneous ...
Phosphorinane and enol rings in one molecule. Evidence for reciprocal stabilization of half-chair conformations

Polozov A.; Khotinen A.; Klimovitskii E. (1996)

The X-ray crystal structure of 2-(2′,4′-dioxo-3′-pentyl)-5,5-dimethyl-2-oxo-1,3,2- dioxaphosphorinane (2) reveals significant half-chair distortion of the axially oriented cis-enol ring. The molecule also undergoes in-plane ...
The non-planarity of the enol tautomer of phosphorus-substituted pentane-2,4-dione. Influence on hydrogen bonding strength, enol content and enthalpic stabilization

Polozov A.; Gainullin R.; Litvinov I.; Khotinen A.; Kataeva O.; Stolov A.; Yarkova E.; Klimovitskii E. (1994)

The X-ray crystal structure of 2-(2′,4′-dioxo-3′-pentyl)-5,5-dimethyl-2-oxo-1,3,2-dioxaphosphorinane (II) reveals significant half-chair distortion of the axially oriented cis-enol ring and the tilt of the methyl groups ...

Now showing items 1-8 of 8

Search DSpace

Advanced Search

Browse

All of Kazan Federal University Digital Repository

Browsing by Author "Khotinen A."

Browsing by Author "Khotinen A."

Search DSpace

Browse

All of Kazan Federal University Digital Repository

My Account