(RSS)-[N-Hydroxyethyloxy]-hexafluoroVal–MeLeu–Alatert-butyl ester

(RSS)-[N-Hydroxyethyloxy]-hexafluoroVal–MeLeu–Ala tert-butyl ester

THE TITLE COMPOUND [SYSTEMATIC NAME: (2S,5S,8R)-tert-butyl 8-(1,1,1,3,3,3-hexafluoropropan-2-yl)-12-hydroxy-5-isobutyl-2,6-dimethyl-4,7-dioxo-10-oxa-3,6,9-triazadodecanoate], C(21)H(36)F(6)N(3)O(6), is a tripeptide crystallizing in the chiral ortho-rhom-bic spacegroup P2(1)2(1)2(1). The absolute configuration (R) of the chiral center in the hexa-fluoro-valine unit is based on the known stereoch...

N-(Fluoren-9-ylmethoxy­carbon­yl)-l-aspartic acid 4-tert-butyl ester

The bond distances and bond angles of the title compound, C(23)H(25)NO(6), are consistent with values typically found for fluoren-9-ylmethoxy-carbonyl-protected amino acids. The conformations of the backbone and the side chain are slightly different from those of l-aspartic acid. The crystal structure exhibits two inter-molecular hydrogen bonds, forming a two-dimensional sheet structure paralle...

Bioremediation of environmental endocrine disruptor di-n-butyl phthalate ester by Rhodococcus ruber.

In this study DBP-degradation strain CQ0301 was isolated from rubbish landfill soil. According to the biophysical, biochemical characteristics and analysis of 16S rRNA, the strain was identified as Rhodococcus ruber. Three new protein bands could be fractioned after DBP-inducing, which were suspected to participate the process of DBP-degrading. Catechol was suspected to be an intermediate produ...

- Total Synthesis of 7 - N - Acetylderoethyllavendamycin sec - Butyl Ester and 7 -

Computer-assisted automated synthesis. III. Synthesis of substituted N-(carboxyalkyl) amino-acid tert-butyl ester derivatives

A versatile automated synthesis apparatus, equipped with a chemical artificial intelligence, was developed to prepare and isolate a wide variety of compounds. The apparatus was to the synthesis of substituted N-(carboxyalkyl)amino-acids. The apparatus [1,2] is composed of units for performing various tasks,for example reagent supply, reaction, purification and separation, each linked to a contr...