cas 66584-72-3, ansamitocin P-3 | Articles data ｜lookchem

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66584-72-3

Articles about 66584-72-3Total 3 be found

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PREPARATION OF MAYTANSINOID ESTERS
Provided are efficient methods for direct coupling of a maytansinoid with a carboxylic acid to prepare a maytansinoid C-3 ester in high yield using a rare earth metal-based or trifluoromethanesulfonate-based Lewis acid catalyst and a base together with a coupling reagent. Also provided are compositions used in such methods.
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Paragraph 0444; 0445

(2014/07/08)

Method for the preparation of maytansinoid esters
Improved processes for the preparation and purification of maytansinoid esters, especially thiol and disulfide-containing maytansinoids are described. In one aspect the process comprises a process of making a maytansinoid ester comprising forming an anion of maytansinol or a maytansinoid bearing a free C-3 hydroxyl moiety and reacting the anion with an activated carboxyl compound to thereby produce the maytansinoid ester.
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Page/Page column 4

(2008/06/13)

Chemical modification of ansamitocins. II. Synthesis of 3-epimaytansionoids via 3-maytansinones
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Akimoto,Kawai,Hashimoto,Nomura
p. 2565 - 2570
(2007/10/02)

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Chemical Properties

Melting Point: 190-192℃
Boiling Point: 833.1°C at 760 mmHg
Flash Point:457.7°C
Density: 1.29
Storage Temp.:2-8°C
Vapor Pressure: 1.97E-29mmHg at 25°C
Refractive Index: 1.583
PKA: 9.82±0.70(Predicted)
PSA: 136.16000
LogP: 4.71740

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