Phosphorus-based allenes as scaffolds in cycloaddition and cyclization reactions

ABSTRACT

In this article, we describe some of our results on the reactions of allenylphosphonates/allenyl phosphine oxides and allenyl diazaphosphole oxides, primarily cycloaddition and cyclization reactions. Depending on the substituents, both the α,β and β,γ -cycloaddition products have been observed. A novel cyclization reaction of a functionalized allenylphosphine oxide with diethylamine leading to 3-diethylamino-4-diphenylphosphinoyl-1-naphthol is reported. Representative compounds have been characterized by X-ray crystallography.

GRAPHICAL ABSTRACT

KEYWORDS:

• Allenes
• allenylphosphonates
• allenylphosphine oxides
• cycloaddition
• cyclization

Funding

We thank Council of Scientific and Industrial Research (CSIR), Department of Science and Technology (DST-FIST and PURSE), and University Grants Commission (UGC-UPE-2) for financial support.