Stereostructure of 8‐chloro‐5,6‐di(methoxycarbonyl)‐4,7‐dimethyl‐2‐ethoxy‐2‐phosphabicyclo[2.2.2]octa‐5,7‐diene 2‐oxide

Abstract

The first X-ray structure of a phosphabicyclooctadiene, together with the N M R and mass spectral characterization of its isomers, is reported. 0 1996

2-Ethyl-2-phosphabicyclo[2.2.2]oct-7-ene derivatives: Synthesis and use in fragmentation-related phosphorylations

“…• C. Due to their more strained ring, the phosphabicyclooctadiene oxides of type 3 are indeed thermally less stable [13,14].…”

“…Isomers of the products 2 and 3 were characterized by 31 P, 13 C, and 1 H NMR, as well as mass spectrometry. Thermal examinations (TG, DTG, and DSC) suggested that phosphabicyclooctene oxide 2 underwent the elimination of the bridging P-moiety in the range of 270-430…”

“…The 31 P, 13 C, and 1 H NMR spectra were recorded on a Bruker DRX-500 spectrometer operating at 202.4, 125.7, and 500 MHz, respectively. Chemical shifts are downfield relative to 85% H 3 PO 4 or TMS.…”

Synthesis and fragmentation of new 2‐phosphabicyclo[2.2.2]octene 2‐oxides

“…It was found that the phosphabicyclooctadienes (1), because of their more strained framework, are more suitable for use in thermo induced fragmentations than the corresponding bicyclooctene derivatives (2) [6][7][8]. Both precursors (1 and 2), however proved to be excellent in UV-light mediated phosphorylations [2,4,5].…”

“…In the past decade, the syntheses and fragmentation abilities of phosphabicyclooctadienes (1) and phosphabicyclooctenes (2) were intensively studied [1][2][3][4][5][6][7][8].…”