Conversion of Arylboronic Acids to Tetrazoles Catalyzed by ONO Pincer-Type Palladium Complex
作者:Arumugam Vignesh、Nattamai S. P. Bhuvanesh、Nallasamy Dharmaraj
DOI:10.1021/acs.joc.6b02277
日期:2017.1.20
A convenientsynthesis of a library of tetrazoles through a novel and operationally simple protocol effecting the direct conversion of arylboronic acids catalyzed by a new ONO pincer-type Pd(II) complex under mild reactionconditions using the readily available reagents is reported. The palladium complex was reused up to four cycles in an open-flask condition.
The present invention relates to the use of selective P2X
7
receptor antagonists of formula I, or a pharmaceutically acceptable salt or prodrug thereof
wherein D, R
1
and R
2
are as defined in claim
1
, for the treatment of neuropathic pain, chronic inflammatory pain, inflammation, neurodegeneration and for promoting neuroregeneration,
Disclosed is a silver halide emulsion, which comprises at least one methine dye represented by the general formula (I):
wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one carbon, nitrogen, sulfur or oxygen atom; ℓ1 represents an integer 1 or 2; 12 represents an integer 0 or 1, ℓ3 represents an integer from 1 to 4; and Ar represents an aromatic polycyclic group formed of 8 or more atoms containing at least one nitrogen atom, with the proviso that said nitrogen atom is in a form such that tautomerism does not produce
Also disclosed is a silver halide photographic material, which comprises on a support a silver halide photographic emulsion layer comprising silver halide grains containing iron ions in an amount of 10-7 to 10-3 mol per mol of silver halide and having a localized phase with an iron ion concentration of 10 times or more than that of the other portions, in a surface layer falling within 50% or less of the volume of the grain and at least one methine dye represented by general formula (I') and which exhibits a blue sensitivity difference of 0.1 or less between when it is developed after exposure in vacuo under 10-5 torr and when it is developed after exposure in air under 760 torr:
wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one of a carbon, a nitrogen, a sulfur or an oxygen atom; Ar' represents an aromatic polycyclic group formed of 8 or more atoms; ℓ1 represents an integer 1 or 2; 12 represents an integer 0 or 1; and ℓ3 represents an integer from 1 to 4.
A novel silver halide photographic material is disclosed, which comprises at least one methine dye represented by the following formula (I):
wherein Z₁ and Z₂ each represents an atomic group required for the formation of a 5- or 6-membered nitrogen-containing heterocyclic group; R₁ represents an alkyl, aryl or heterocyclic group; R₂ and R₃ each represents an alkyl group, with the proviso that at least one of R₂ and R₃ represents an alkyl group substituted by an alkoxy or aryloxy group; L₁, L₂, L₃, L₄, L₅, L₆, and L₇ each represents a methine group; n₁ and n₂ each represents an integer 0 or 1; M represents a charge neutralizing ion; and m represents 0 or a higher number required for the neutralization of electric charge in the molecule.