naa a22 4500 510733883 CHVBK 20180411083002.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s12039-013-0501-z doi (NATIONALLICENCE)springer-10.1007/s12039-013-0501-z Synthesis of substituted guanidines using Zn-Al hydrotalcite catalyst [Elektronische Daten] [LAKSHMI MANNEPALLI, VENKANNA DUPATI, SWARNA VALLABHA, MANORAMA SUNKARA V] Substituted guanidines were synthesized by the guanylation of amines with carbodiimides using Zn-Al hydrotalcite (Zn-Al HT) catalyst. Zn-Al HT was prepared by co-precipitation method and characterized by X-ray powder diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman and Thermogravimetric-Differential Thermal Analysis (TG-DTA). The heterogeneous catalyst afforded moderate to good yields (∼50-60%) of substituted guanidines in toluene at 110°C in 12h. The catalyst was recovered quantitatively by simple filtration and reused for three cycles with consistent activity. The XRD and FTIR studies of the used catalyst shows no variation in the structure of the catalyst even after three recycles. Graphical Abstract Substituted guanidines were synthesized by the guanylation of amines with carbodiimides using Zn-Al hydrotalcite (Zn-Al HT) catalyst. The catalyst was recovered and reused for three cycles with consistent activity. No structural changes were evidenced in the catalyst even after three recycles. Indian Academy of Sciences, 2013 Guanylation nationallicence primary amine nationallicence carbodiimides nationallicence hydrotalcites nationallicence MANNEPALLI LAKSHMI Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, 500 007, Hyderabad, India aut DUPATI VENKANNA Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, 500 007, Hyderabad, India aut VALLABHA SWARNA Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, 500 007, Hyderabad, India aut SUNKARA V MANORAMA Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, 500 007, Hyderabad, India aut Journal of Chemical Sciences Springer India 125/6(2013-11-01), 1339-1345 0974-3626 125:6<1339 2013 125 12039 https://doi.org/10.1007/s12039-013-0501-z text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12039-013-0501-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- MANNEPALLI LAKSHMI Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, 500 007, Hyderabad, India aut NATIONALLICENCE 700 1- DUPATI VENKANNA Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, 500 007, Hyderabad, India aut NATIONALLICENCE 700 1- VALLABHA SWARNA Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, 500 007, Hyderabad, India aut NATIONALLICENCE 700 1- SUNKARA V MANORAMA Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, 500 007, Hyderabad, India aut NATIONALLICENCE 773 0- Journal of Chemical Sciences Springer India 125/6(2013-11-01), 1339-1345 0974-3626 125:6<1339 2013 125 12039 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer