scholarly journals Microwave-assisted synthesis of optically active N-substituted 2-methyl-2H-benzo[b][1,4]oxazin-3(4H)-ones and -thiazin-3(4H)-ones via Smiles rearrangement

2013 ◽  
pp. 11
Author(s):  
Dong-Soo Dong-Soo Shin ◽  
Hua Zuo ◽  
Li-juan Meng ◽  
Zhu-Bo Li ◽  
Gautam Dupati ◽  
...  
Keyword(s):  
Optically Active ◽  
Microwave Assisted Synthesis ◽  
Smiles Rearrangement ◽  
Microwave Assisted

scholarly journals Microwave-assisted synthesis and characterization of some optically active poly(ester-imide) thermoplastic elastomers

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Saeed Zahmatkesh ◽  
Abdol Reza Hajipour
Keyword(s):  
Thermal Analyses ◽  
Specific Rotation ◽  
Thermoplastic Elastomers ◽  
Optically Active ◽  
Microwave Assisted Synthesis ◽  
H Nmr ◽  
Microwave Assisted ◽  
Diacid Chloride ◽  
Elemental Analyses

AbstractPyromellitic dianhydride (1) was reacted with L-leucine (2) to result in [N,N'-(pyromellitoyl)-bis-L-leucine diacid] (3). This compound (3) was converted to N,N'-(pyromellitoyl)-bis-L-leucine diacid chloride (4) by reaction with thionyl chloride. The microwave-assisted polycondensation of this diacid chloride (4) with polyethyleneglycol-diol (PEG-200) and/or three synthetic bisphenols furnish a series of new PEIs and Co-PEIs in a laboratory microwave oven (Milestone). The resulting polymers and copolymers have inherent viscosities in the range of 0.31- 0.53 dl g-1. These polymers are optically active, thermally stable and soluble in polar aprotic solvents such as DMF, DMSO, NMP, DMAc and sulfuric acid. All of the above polymers were fully characterized by IR spectroscopy, 1H NMR spectroscopy, elemental analyses, specific rotation and thermal analyses. Some structural characterizations and physical properties of these optically active PEIs and Co-PEIs are reported.

Optically active: microwave-assisted synthesis and characterization of l-lysine-derived poly (amide-imide)s

Amino Acids ◽  
2010 ◽  
Vol 41 (2) ◽  
pp. 485-494 ◽  
Author(s):  
Ali Reza Alborzi ◽  
Saeed Zahmatkesh ◽  
Karim Zare ◽  
Javad Sadeghi
Keyword(s):  
Optically Active ◽  
Synthesis And Characterization ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted
Sign in / Sign up

Export Citation Format

Share Document