CARBANIONIC DISPLACEMENT REACTIONS AT PHOSPHORUS: DIETHYL (2-PYRIDY L)METHYLPHOSPHONATE SYNTHESIS

Synthesis of Phosphorus Derivatives via Multicomponent Reactions

Stable derivatives of oxaphosphaphenanthrenes were prepared using multicomponent reactions of 3-bromo-2-naphthol, dialkyl acetylenedicarboxylate and trimethyl or triphenyl phosphite under microwave conditions with good yields. 

synthesis of phosphorus derivatives via multicomponent reactions

2-Isocyanato-2-alkenoates-Synthesis and Reactions

reaction of 2-dimethylphosphono-1,3-benzodithiole 3a with conjugated 1,4-diketones for the preparation of 2,2'-bis(I,3dithiole) donors.[41 We have now used the Wittig-Horner reaction of 3 b, which was synthesized by a similar method as that for 3a,15] to prepare 1. In this case, a cyclopentadiene adduct ofp-benzoquinone 4 was used as a diketone and after introduction of the 1,3-dithiole rings t...

Diethyl 2-(2-nitro­benzyl­idene)malonate

In the title compound, C(14)H(15)NO(6), the ethoxy-carbonyl groups adopt extended conformations. In the crystal, mol-ecules are linked into centrosymmetric dimers via pairs of C-H⋯O hydrogen bonds with a R(2) (2)(20) motif.

Phenanthridine synthesis via [2+2+2] cyclotrimerization reactions.

A concise synthesis of phenanthridines via a microwave-assisted [2+2+2] cyclotrimerization reaction has been developed.