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A direct approach to selective sulfonation of triarylphosphines

✍ Scribed by Henrik Gulyás; Áron Szöllősy; Brian E Hanson; József Bakos

Book ID
104250743
Publisher
Elsevier Science
Year
2002
Tongue
French
Weight
135 KB
Volume
43
Category
Article
ISSN
0040-4039

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✦ Synopsis

A practical and convenient synthesis of mono-, di-and a trisulfonated phosphines from triphenylphosphine analogs, (2,4-dimethylphenyl) 3-n -(phenyl) n -phosphine and (4-methoxyphenyl) 3-n -(phenyl) n -phosphine (n=0-2), is described, respectively. This represents an easy way to prepare water-soluble phosphines with complete selectivity, and with essentially no phosphine oxide formation.

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✍ Akihiko Ueno; Ronald Breslow 📂 Article 📅 1982 🏛 Elsevier Science 🌐 French ⚖ 213 KB

Tosylation of the secondary side of S-cyclodextrin, which has previously been incorrectly reported, can be achieved by tosyl transfer from 3-nitrophenyl toluenesulfonate to the C-2 hydroxyl of the cyclodextrin. Cyclodextrins are toroidal cyclic oligosaccharides with the secondary hydroxyls of gluco