Synthesis of a new nano hybrid of 5,10,15,20-mesotetra(4-aminophenyl) porphyrin (TAP) functionalized with multi-walled carbon nanotubes (MWCNTs) through an amide linkage is reported for the first time. This MWCNT-TAP hybrid was characterized by Raman, Fourier transform infrared (FT-IR), Transmission electron microscopy (TEM), Thermogravimetric analysis (TGA), absorption and emission spectroscopy. TGA analysis reveals that there is a ∼60% weight loss when heated from 150-750 • C, which is attributed to the amount of TAP molecules that were attached to MWCNTs. Electronic properties of MWCNTs were improved in the hybrid compared to raw MWCNTs as evidenced by Raman spectra. The absorption and emission spectra of TAP and nano-hybrid indicate strong positive solvatochromism with increasing solvent polarity. Fluorescence quenching of TAP in different solvents were observed in the emission spectra in the MWCNT-TAP hybrid, indicating that covalent functionalization facilitated effective energy or electron transfer from porphyrin moiety to the MWCNT.

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Substituted Benzoxazolyl 3,4-Dihydropyrimidine (1H)-(Thio)-ones. -The classical Biginelli reaction is extended to the use of N-substituted benzoxazolyl (thio-)semicarbazides as intermediates. -(PANI*, M. S.; ARJUN, M.; SRIDHAR, D.; SRINIVAS, K.; RAVIPRASAD, T.; Chin. Chem. Lett. 20 (2009) 8, 909-912; Dep. Pharm., Kakatiya Univ., Warangal 506 009, India; Eng.) -R. Simon 52-171

An efficient synthesis of benzoxazole‐substituted 3,4‐dihydropyrimidinones (DHPMs) using alumina supported trifluoromethane sulfonic acid as the catalyst for the first time from an aldehyde, β‐keto ester, and benzoxazole‐substituted urea and thiourea under solvent‐free conditions is described. When compared with the classical Biginelli reaction conditions, this new method consistently has the advantage of excellent yields (80–93%) and short reaction time (30–120 minutes) at 120°C temperature. J. Heterocyclic Chem., 46, 119 (2009).

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