BINGE
发表于 2025-3-23 13:47:22
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得意人
发表于 2025-3-23 16:47:09
The Template Effect,exceeds the probability of linear polymer formation.. It therefore seems remarkable that many of the syntheses of macrocyclic polyethers which have been reported involve less than dilute if not very concentrated conditions.. The success of these large-ring intramolecular S.2 reactions is generally a
Trypsin
发表于 2025-3-23 20:09:23
Syntheses of Oxygen Macrocycles,ring sizes and substituents. These compounds were prepared by a variety of routes and Pedersen offered a scheme in which he generalized the synthetic approaches he used. He designated the four principal methods “V”, “W”, “X”, and “Y”. The methods are discussed individually.
multiply
发表于 2025-3-23 23:17:30
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arbiter
发表于 2025-3-24 03:39:25
Crown Esters and Macrocyclic Polyether Lactones, linear.. In addition to this very important observation, he showed that thermolysis . of certain polymers could also yield macrocyclic materials. Quite a number of papers have been published on this subject since that time, especially dealing with the chemistry of phthalate., isophthalate., and ter
Dissonance
发表于 2025-3-24 08:19:51
Open-chained Equivalents of Crown Ethers,eful in similar applications. Perhaps these compounds would be easier and more economical to prepare and ultimately, of course, better in one respect or another than the molecules which inspired the research. In particular, the collateral developments of crown ether chemistry and phase transfer cata
MUT
发表于 2025-3-24 11:03:15
Cryptands and Related Polycyclic Systems,ity. These compounds were macrobicyclic polyethers having nitrogen pivot atoms and exhibiting the ability to bind a variety of metal cations. The syntheses of the first examples of macrobicyclic amines were carried out as illustrated in Eq. (8.1). The appropriate diaminopolyether and polyether diacy
神刊
发表于 2025-3-24 16:21:02
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AVOID
发表于 2025-3-24 23:03:51
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alcohol-abuse
发表于 2025-3-25 00:51:57
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