01474nas a2200265   4500008004100000022001400041245008100055210006900136260007900205300001400284490000700298520056800305653002000873653002800893653000900921653001000930653001700940653002300957100002300980700002201003700002201025700002601047700002801073856010701101       2009                        eng d  a1001-841700aAlum: an efficient catalyst for one-pot synthesis of alpha-aminophosphonates0 aAlum an efficient catalyst for onepot synthesis of alphaaminopho  a360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USAbELSEVIER SCIENCE INCcSEP  a1042-10460 v203 a<p>Alum (KAl(SO(4))(2)center dot 12H(2)O) is an inexpensive, efficient, non-toxic and mild catalyst for the one-pot synthesis of alpha-aminophosphonates. A three component reaction of an aldehyde/ketone, an an-tine and triethyl phosphite was carried out under solvent-free conditions to afford the corresponding alpha-aminophosphonates in short reaction times and high yields with the green aspects by avoiding toxic catalysts and solvents. (C) 2009 Murlidhar S. Shingare. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.</p>10aAldehyde/ketone10aalpha-Aminophosphonates10aAlum10aAmine10aSolvent-free10aTriethyl phosphite1 aSonar, Swapnil, S.1 aShelke, Kiran, F.1 aKakade, Gopal, K.1 aShingate, Bapurao, B.1 aShingare, Murlidhar, S.  uhttps://library.ncl.res.in/content/alum-efficient-catalyst-one-pot-synthesis-alpha-aminophosphonates-001487nas a2200277   4500008004100000022001400041245011000055210006900165260008900234300001400323490000700337520047400344653002000818653002700838653000900865653001900874653001700893653002300910100002300933700002500956700002200981700002601003700002601029700002801055856012601083       2009                        eng d  a0253-296400aAlum catalyzed convenient synthesis of quino [2,3-b][1,5]benzoxazepine alpha-aminophosphonate derivatives0 aAlum catalyzed convenient synthesis of quino 23b15benzoxazepine   a635-4 YEOGSAM-DONG, KANGNAM-GU, SEOUL 135-703, SOUTH KOREAbKOREAN CHEMICAL SOCcAUG  a1711-17140 v303 a<p>We have described an efficient synthesis of quino[2,3-b][1,5]benzoxazepine alpha-aminophosphonate derivatives by the nucleophilic addition of triethyl phosphite to substituted quino[2,3-b][1,5]benzoxazepines promoted by easily available, inexpensive and mild catalyst KAl(SO(4))(2)center dot 12H(2)O (alum). The reactions proceed smoothly at room temperature under solvent-free reaction conditions and providing high yield of product in very short reaction time.</p>10a5]benzoxazepine10aalpha-Aminophosphonate10aAlum10aQuino[2.3-b][110aSolvent-free10aTriethyl phosphite1 aSonar, Swapnil, S.1 aSadaphal, Sandip, A.1 aShitole, Nana, N.1 aJogdand, Nivrutti, R.1 aShingate, Bapurao, B.1 aShingare, Murlidhar, S.  uhttps://library.ncl.res.in/content/alum-catalyzed-convenient-synthesis-quino-23-b15benzoxazepine-alpha-aminophosphonate-001364nas a2200253   4500008004100000022001400041245009200055210006900147260011700216300001200333520037600345653001300721653002900734653003900763653001700802653002300819100002300842700002600865700002100891700002600912700002600938700002800964856011800992       2009                        eng d  a1424-637600aAmmonium metavanadate: an effective catalyst for synthesis of alpha-hydroxyphosphonates0 aAmmonium metavanadate an effective catalyst for synthesis of alp  aC/O ALAN R KATRITZKY, UNIV FLORIDA, DEPT CHEMISTRY, PO BOX 117200, GAINESVILLE, FL 32611 USAbARKAT USA INCcDEC  a138-1483 a<p>Ammonium metavanadate (NH(4)VO(3)) is an inexpensive, efficient and mild catalyst for the synthesis of alpha-hydroxyphosphonate derivatives by the reaction of various aryl or heteroaryl aldehydes with triethylphosphite at room temperature. This method affords the alpha-hydroxyphosphonates in short reaction times, under solvent-free conditions, and in high yield.</p>10aAldehyde10aalpha-hydroxyphosphonate10aAmmonium metavanadate (NH(4)VO(3))10aSolvent-free10aTriethyl phosphite1 aSonar, Swapnil, S.1 aKategaonkar, Amol, H.1 aWare, Madhav, N.1 aGill, Charansingh, H.1 aShingate, Bapurao, B.1 aShingare, Murlidhar, S.  uhttps://library.ncl.res.in/content/ammonium-metavanadate-effective-catalyst-synthesis-alpha-hydroxyphosphonates-0