کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1346608 | 1500359 | 2012 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
CAL-B catalyzed synthesis of chiral polyamides
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی معدنی
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چکیده انگلیسی
CAL-B (Novozym 435) plays a dual role in our approach to chiral polyamides. It is used to introduce the appropriate chirality in the synthesis of monomers (amino-esters and diamines) from racemic 12-methyldodecalactone and then to catalyze their polycondensation. The AB and AABB enzymatic polymerizations have been carried out under reduced pressure; they give rise to optically active polymers in good yield, with a good degree of polymerization, and a narrow polydispersity index. This approach demonstrates that the presence of a methyl group at the stereogenic center at the α-position relative to the nitrogen atom does not slow down the polymerization as compared with the polycondensation of a related achiral monomer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron: Asymmetry - Volume 23, Issues 11â12, 30 June 2012, Pages 867-875
Journal: Tetrahedron: Asymmetry - Volume 23, Issues 11â12, 30 June 2012, Pages 867-875
نویسندگان
Florent Poulhès, Dominique Mouysset, Gérard Gil, Michèle P. Bertrand, Stéphane Gastaldi,