Synthesis of Densely Phosphorylated Bis‐1, 5‐Diphospho‐myo‐Inositol Tetrakisphosphate and its Enantiomer by Bidirectional P‐Anhydride Formation1. (14th July 2014)

• Record Type: Journal Article
• Authors: Capolicchio, Samanta; Wang, Huanchen; Thakor, Divyeshsinh T.; Shears, Stephen B.; Jessen, Henning J.
• Is Part Of: Angewandte Chemie. Volume 126:Number 36(2014)
• Page Start: 9662
• Page End: 9665
• Publication Date: 2014-07-14
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201404398
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The ubiquitous mammalian signaling molecule bis‐diphosphoinositol tetrakisphosphate (1, 5‐(PP)₂‐myo‐InsP₄, or InsP₈) displays the most congested three‐dimensional array of phosphate groups found in nature. The high charge density, the accumulation of unstable P‐anhydrides and P‐esters, the lack of UV absorbance, and low levels of optical rotation constitute severe obstacles to its synthesis, characterization, and purification. Herein, we describe the first procedure for the synthesis of enantiopure 1, 5‐(PP)₂‐myo‐InsP₄ and 3, 5‐(PP)₂‐myo‐InsP₄ utilizing a <italic>C</italic>₂‐symmetric P‐amidite for desymmetrization and concomitant phosphitylation followed by a one‐pot bidirectional P‐anhydride‐forming reaction that combines sixteen chemical transformations with high efficiency. The configuration of these materials is unambiguously shown by subsequent X‐ray analyses of both enantiomers after being individually soaked into crystals of the kinase domain of human diphosphoinositol pentakisphosphate kinase 2.</p> </abstract>