Conformational studies on phosphorus-containing macrocycles
✍ Scribed by R. Boese; R. Boetzel; G. Hägele
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 403 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
H,H and P,H coupling constants and variable‐temperature ^1^H and ^13^C NMR spectra and ^13^C T~1~ values for some macrocyclic dithiophosphonic esters are presented to show that these compounds possess reduced flexibility in comparison with crown ethers. The NMR spectroscopic results are supported by an x‐ray structure which shows a highly strained ring system.
📜 SIMILAR VOLUMES
## Abstract Review: 79 refs.
The paper describes the synthesis of several polypyromellitimide samples containing phosphine oxide in the backbone and maleimido groups as pendant side chains. These polymers were obtained by solution polycondensation reaction in DMF in three steps. First step involved the reaction of equimolar amo
Phosphorus dialdehydes RP (OCJY4CHO)2 (R = Ph, Me2N) react with phosphodihydrazides PhP(Y)-[NICH3)NH2I2 (Y = S , 0) to give macrocycles 6a-c arising from [2 + 2 1 cyclocondensation reactions. Treatment of phosphodihydrazone PhP(S) [OC6H4CH= N-N(Me)HI2 7 with phenyldichlorophosphine affords macrocycl