Synlett, Table of Contents LETTER © Georg Thieme Verlag Stuttgart · New York From Solution-Phase to ‘On-Column’ N-Dearylation of β-Lactams by Silica-Supported Ceric Ammonium Nitrate (CAN-SiO2) Aliasghar Jarrahpour*, Maaroof ZareiDepartment of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, IranFax: +98(711)2280926; e-Mail: jarrah@chem.susc.ac.ir; e-Mail: aliasghar6683@yahoo.com; Recommend Article Abstract Buy Article All articles of this category Abstract It has been shown that N-(4-methoxy or 4-ethoxyphenyl) groups can be oxidatively removed by silica gel supported ceric ammonium nitrate (CAN-SiO2) under mild conditions in solution and on column. The yields in these two methods were good to excellent and purification of products is simpler than the general method by CAN. Especially the ‘on-column’ reaction is mild, easy, efficient, and cheap. The lower mobility of CAN-SiO2 makes it safer to handle. Key words on-column reaction - N-dearylation - N-unsubstituted 2-azetidinone - β-lactam - ceric ammonium nitrate - silica supported Full Text References References 1a Southgate R. Branch C. Coulton S. Hunt E. Recent Progress in the Chemical Synthesis of Antibiotics and Related Microbial Products Vol. 2: Springer; Berlin: 1993. p.621 1b Morin RB. Gorman M. Chemistry and Biology of β-Lactam Antibiotics Academic Press; New York: 1982. 1c Jarrahpour AA. Zarei M. Tetrahedron Lett. 2007, 48: 8712 1d Jarrahpour AA. Khalili D. Tetrahedron Lett. 2007, 48: 7140 1e Jarrahpour AA. Shekarriz M. Taslimi A. Molecules 2004, 9: 29 1f Jarrahpour AA. Shekarriz M. Taslimi A. Molecules 2004, 9: 939 1g Cordero FM. Salvati M. Pisaneschi F. Brandi A. Eur. J. Org. Chem. 2004, 2205 For β-lactam synthon methods, see: 2a Alcaide B. Almendros P. Curr. Med. Chem. 2004, 11: 1921 2b Palomo C. Aizpurua JM. Ganboa I. Oiarbide M. Curr. Med. Chem. 2004, 11: 1837 2c Deshmukh ARAS. Bhawal BM. Krishnaswamy D. Govande VV. Shinkre BA. Jayanthi A. Curr. Med. Chem. 2004, 11: 1889 2d Alcaide B. Almendros P. Synlett 2002, 381 2e Alcaide B. Almendros P. Chem. Soc. Rev. 2001, 30: 226 2f Ojima I. Delaloge F. Chem. Soc. Rev. 1997, 26: 377 2g Ojima I. Acc. Chem. Res. 1995, 28: 383 For application in semisynthesis of paclitaxel derivatives, see: 2h Paik Y. Yang C. Metaferia B. Tang S. Bane S. Ravindra R. Shanker N. Alcaraz AA. Johnson SA. Schaefer J. O’Connor RD. Cegelski L. Snyder JP. Kingston DGI. J. Am. Chem. Soc. 2007, 129: 361 2i Taxol®: Science and Applications Suffness M.; CRC Press: Boca Raton FL: 1995. 3 Cossio FP. Lecea B. Palomo C. J. Chem. Soc., Chem. Commun. 1987, 1743 4a Bandini E. Favi G. Martelli G. Panunzio M. Piersanti G. Org. Lett. 2000, 2: 1077 4b Hart DJ. Kanai K.-I. Thomas DG. Yang T.-K. J. Org. Chem. 1983, 48: 289 5a Jarrahpour AA. Zarei M. Molecules 2007, 12: 2364 5b Imbach P. Lang M. Garcia-Echeverria C. Guagnano V. Noorani M. Roesel J. Bitsch F. Rihs G. Furet P. Bioorg. Med. Chem. Lett. 2007, 17: 358 5c Turos E. Heldreth B. Long TE. Jang S. Reddy GSK. Dickeyb S. Lim DV. Bioorg. Med. Chem. 2006, 14: 3775 5d Del Buttero P. Molteni G. Pilati T. Tetrahedron 2005, 61: 2413 5e Annunziata R. Benaglia M. Cinquini M. Cozzi F. J. Org. Chem. 2003, 68: 2952 5f Podlech J. Linder MR. J. Org. Chem. 1997, 62: 5873 5g Karupaiyan K. Srirajan V. Deshmukh ARAS. Bhawal BM. Tetrahedron Lett. 1997, 38: 4281 6a Kumar Tiwari D. Shaikh AY. Pavase LS. Gumaste VK. Deshmukh ARAS. Tetrahedron 2007, 63: 2524 6b Desai KG. Desai KR. Bioorg. Med. Chem. 2006, 14: 8271 6c Jiao L. Zhang Q. Liang Y. Zhang S. Xu J. J. Org. Chem. 2006, 71: 815 6d Dhawan R. Dghaym RD. St. Cyr DJ. Arndtsen BA. Org. Lett. 2006, 8: 3927 6e Balasubramanian S. Gordon KH. Org. Lett. 2001, 3: 53 7a Jarrahpour AA. Zarei M. Molecules 2006, 11: 49 7b Kuznetsova L. Ungureanu IM. Pepe A. Zanardi I. Wu X. Ojima I. J. Flourine Chem. 2004, 125: 487 7c Lee HK. Chun JS. Pak CS. Tetrahedron 2003, 59: 6445 8 Varma RS. Tetrahedron 2002, 58: 1235 9a Doro FG. Rodrigues-Filho UP. Tfouni E. J. Colloid Interface Sci. 2007, 307: 405 9b Mukhopadhyay B. Tetrahedron Lett. 2006, 47: 4337 9c Rajput VK. Mukhopadhyay B. Tetrahedron Lett. 2006, 47: 5939 9d Tiwari P. Misra AK. Tetrahedron Lett. 2006, 47: 3573 10 Banerjee AK. Mimo MSL. Vera Vegas WJ. Russ. Chem. Rev. 2001, 70: 971 11 Hwu JR. Jain ML. Tsai F.-Y. Tsay S.-C. Balakumar A. Hakimelahi GH. J. Org. Chem. 2000, 65: 5077 12a Ali MH. Niedbalski M. Bohnert G. Bryant D. Synth. Commun. 2006, 36: 1751 12b Fisher A. Henderson GN. Synthesis 1985, 641 13 Srinivas KVNS. Das B. J. Chem. Res. 2002, 556 14a Chawla HM. Mittal RS. Synthesis 1985, 70 14b Chakrabarty M. Batabyal A. Synth. Commun. 1994, 24: 1 15 Lectka T. Hafez AM. Taggi AE. Dudding T. J. Am. Chem. Soc. 2001, 123: 10853 16a Mukhopadhyay B. Maurer SV. Rudolph N. Van Well RM. Russell DA. Field RA. J. Org. Chem. 2005, 70: 9059 16b Rosenau T. Hofinger A. Potthast A. Kosma P. Org. Lett. 2004, 6: 541 17 Corley EG. Karady S. Abramson NL. Tetrahedron Lett. 1988, 29: 1497