Synthesis and 1H, 13C and 31P NMR studies of 2,10-dichloro-6-aryloxy-12H-dibenzo [d,g] [1,3,2]-dioxaphosphocin 6-oxides

✍ Scribed by C. Devendranath Reddy; R. S. N. Reddy; C. Naga Raju; Marwan ElMasri; K. Darrell Berlin; Shankar Subramanian

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 499 KB
• Volume: 29
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1260291111

✦ Synopsis

Abstract

The spectral analyses and syntheses of several novel 2,10‐dichloro‐6‐aryloxy/alkyl‐12__H__‐dibenzo [d,g] [1,3,2] dioxaphosphocin 6‐oxides have been achieved. Long‐range coupling [^5^J(H,P) = 2.4 Hz] was observed between phosphorus and the bridged methylene protons. Based upon NMR data, a tub‐like conformation is proposed for the central eight‐membered dioxaphosphocin ring. Long‐range ^2^J(P,O,C) and ^3^J(P,O,C,C) couplins were determined, as were the ^31^P chemical shifts for sixteen members of these new heterocycles. A variable‐temperature study of one member suggested the presence of a tub form as a reasonable candidate for one major conformer but the presence of other forms was also implied.