𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Direct NMR evidence of the axial preference of the substituent on phosphorus in 2-chloro- and 2-methoxy-1,2,3-dioxaphosphorinanes.

✍ Scribed by M. Haemers; R. Ottinger; J. Reisse; D. Zimmermann

Publisher
Elsevier Science
Year
1971
Tongue
French
Weight
214 KB
Volume
12
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis

It was shown by NMR spectmscopy that the 1,3,2-dioxaphosphorinane cycle has a chair conformation [1.2.31. In tricoordinate phosphorus derivatives, the preferred orientation for the substituent on phosphorus (-OR or halogen1 remains a subject of discussion. In fact, proofs of the preferred axiality have been given by different authors [2,4,51 but, until now, results

πŸ“œ SIMILAR VOLUMES

Unexpected axial preference of the Me2N
Unexpected axial preference of the Me2N substituent on the phosphorus atom of the P(III) 1,3,2,-oxazaphosphorinane ring system
✍ Yande Huang; Nasreen N. Mullah; Alan E. Spochik; Atta M. Arif; Wesley G. Bentrud πŸ“‚ Article πŸ“… 1991 πŸ› Elsevier Science 🌐 French βš– 279 KB

The conformations of a series of 5,5-dimethyl-Z-Z-1,3f2-oxazaphosphorinanes (Z = MeO, (CF,),CHO, Ph, MeaN, and I-Pr N) have been investigated by H NMR spectroscopy and by X-ray crystallography. Surprising y, T Me,N displays a strong preference for axial attachment to the ring; and 1-Pr,N also is axi

Synthesis and phosphorylating properties
Synthesis and phosphorylating properties of 2-chloro-2,3-dihydro-3-(methylsulfonyl)-1,3,2-benzoxazaphosphole 2-oxide. Derivatives with chloro substituents on the benzene ring
✍ HΓΌnsch, Sabine ;Richter, Wolfgang ;Ugi, Ivar ;Chattopadhyaya, Jyoti πŸ“‚ Article πŸ“… 1994 πŸ› John Wiley and Sons 🌐 English βš– 561 KB

## Abstract The synthesis and the use of the five‐membered cyclic phosphorylating agents 1a–c are described. Their difunctional phosphorylating properties towards alkanols and hydroxylated amino acids and the cleavage reaction of the formed phosphoric acid triesters to diesters with oximate or plat