# Synthesis of novel organophosphorus compounds via reaction of substituted 2-oxoindoline-3-ylidene with acetylenic diesters and triphenylphosphine or triphenyl phosphite

## TL;DR

This paper describes a new method to create stable organophosphorus compounds using specific chemical reactions.

## Contribution

The paper introduces a novel synthetic route for functionalized 2-oxoindoline-3-ylidene compounds with phosphorus.

## Key findings

- The reaction produces stable phosphorus ylides or phosphonate esters with good yields.
- Substituted 2-oxoindoline-3-ylidene derivatives react efficiently with acetylenic esters.
- Triphenylphosphine or triphenyl phosphite are effective reagents in the synthesis.

## Abstract

An efficient reaction between triphenylphosphine or triphenyl phosphite and 2-oxoindoline-3-ylidene derivatives in the presence of acetylenic esters leads to functionalized 2-oxoindoline-3-ylidene containing phosphorus ylieds or phosphonate esters. All compounds obtained in these reactions are stable and have good yields.