Synthesis 2011(9): 1447-1455  
DOI: 10.1055/s-0030-1259972
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Synthesis of N-Fmoc-Protected Amino Alkyl Thiocyanates/Selenocyanates and Their Application in the Preparation of 5-Substituted S/Se-Linked Tetrazoles

Vommina V. Sureshbabu*, Basavalingappa Vasantha, Hosahalli P. Hemantha
Peptide Research Laboratory, Room No. 109, Department of Chemistry, Central College Campus, Dr. B. R. Ambedkar Veedhi, Bangalore University, Bangalore 560001, India
Fax: +91(80)22292848; e-Mail: sureshbabuvommina@rediffmail.com; e-Mail: hariccb@gmail.com; e-Mail: hariccb@hotmail.com;
Further Information

Publication History

Received 6 January 2011
Publication Date:
25 March 2011 (online)

Abstract

A novel class of N-Fmoc-protected amino alkyl thiocyanates/selenocyanates has been prepared by thiocyanation/selenocyanation of the corresponding alkyl iodides. These thiocyanates/selenocyanates undergo a facile [2+3]-cycloaddition reaction with sodium azide to afford novel N-Fmoc amino alkyl S/Se-linked tetrazoles.

    References

  • 1a Demko ZP. Sharpless KB. J. Org. Chem.  2001,  66:  7945 
  • 1b Demko ZP. Sharpless KB. Org. Lett.  2002,  4:  2525 
  • 1c Franckevičius V. Knudsen KR. Ladlow M. Longbottom DA. Ley SV. Synlett  2006,  889 
  • 1d Tornoe CW. Christensen C. Meldal M. J. Org. Chem.  2002,  67:  3057 
  • 1e Narendra N. Vishwanatha TM. Sudarshan NS. Sureshbabu VV. Protein Pept. Lett.  2009,  16:  1029 
  • 2a Thornber CW. Chem. Soc. Rev.  1979,  8:  563 
  • 2b Bavetsias V. Marriott JH. Melin C. Kimbell R. Matusiak ZS. Boyle FT. Jackman AL. J. Med. Chem.  2000,  43:  1910 
  • 2c Upadhayaya RS. Jain S. Sinha N. Kishore N. Chandra R. Arora SK. Eur. J. Med. Chem.  2004,  39:  579 
  • 3a Zabrocki J. Smith GD. Dunbar JB. Iijima H. Marshall GR. J. Am. Chem. Soc.  1988,  110:  5875 
  • 3b Knudsen KR. Mitchell CET. Ley SV. Chem. Commun.  2006,  66 
  • 3c Torii H. Nakadai M. Ishihara K. Saito S. Yamamoto H. Angew. Chem. Int. Ed.  2004,  43:  1983 
  • 4a Wincott F. DiRenzo A. Shaffer C. Grimm S. Tracz D. Workman C. Sweedler D. Gonzalez C. Scaringe S. Usman N. Nucleic Acids Res.  1995,  23:  2677 
  • 4b Tsou D. Hampel A. Andrus A. Vinayak R. Nucleosides Nucleotides  1995,  14:  1481 
  • 5 Selenium Compounds: Their Chemistry and Biology   Klayman DL. Günther WHH. Wiley; Chichester: 1973. 
  • 6a Bookser BC. Tetrahedron Lett.  2000,  41:  2805 
  • 6b Kadaba PK. Synthesis  1973,  71 
  • 7 Sureshbabu VV. Venkataramanarao R. Naik SA. Chennakrishnareddy G. Tetrahedron Lett.  2007,  48:  7038 
  • 8 Aldhoun M. Massi A. Dondoni A. J. Org. Chem.  2008,  73:  9565 
  • 9 LeBlanc BW. Jursic BS. Synth. Commun.  1998,  28:  3591 
  • 10 Ozkan H. Yavuz S. Disli A. Yildirir Y. Turker L. Heteroat. Chem.  2007,  18:  255 
  • 11 In amino acid chemistry there is only one report on the synthesis of an amino acid derived S-linked tetrazole, which was obtained via a substitution reaction of Phth-Glu(ψOTs)-OEt with commercially available mercaptotetrazole; see: Marsham PR. Wardleworth JM. Boyle FT. Hennequin LF. Kimbell R. Brown M. Jackman AL. J. Med. Chem.  1999,  42:  3809 
  • 12 Guy RG. In The Chemistry of Cyanates and Their Thio Derivatives   Part 2:  Patai S. John Wiley & Sons; New York: 1977.  Chap. 18. p.819-886  
  • 13a Laufer SA. Liedtke AJ. Tetrahedron Lett.  2006,  47:  7199 
  • 13b Toste FD. Laronde F. Still WJ. Tetrahedron Lett.  1995,  36:  2949 
  • 13c Grant MS. Snyder HR. J. Am. Chem. Soc.  1960,  82:  2742 
  • 13d Blanco JM. Caamano O. Fernandez F. Gomez G. Lopez C. Tetrahedron: Asymmetry  1992,  3:  749 
  • 14a Krief A. Dumant W. Delmotte C. Angew. Chem. Int. Ed.  2000,  39:  1669 
  • 14b Meinke PT. Krafft GA. J. Am. Chem. Soc.  1988,  110:  8679 
  • 15 Kamal A. Chouhan G. Tetrahedron Lett.  2005,  46:  1489 
  • 16a Coote SJ. Davies SG. Middlemiss D. Naylor A. Tetrahedron Lett.  1989,  30:  3581 
  • 16b Khalaf AA. Roberts RM. J. Org. Chem.  1973,  38:  1388 
  • 16c Khalaf AA. Roberts RM. J. Org. Chem.  1972,  37:  4227 
  • 16d Lovel L. Mertins K. Kischel J. Zapf A. Bellar M. Angew. Chem. Int. Ed.  2005,  44:  3913 
  • 17 Iranpoor N. Firouzabadi H. Akhlaghinia B. Azadi R. Synthesis  2004,  92 
  • 18 Disli A. Salman M. Russ. J. Org. Chem.  2009,  45:  151 
  • 19 Kachanov AV. Slabko OY. Baranova OV. Shilova EV. Kaminskii VA. Tetrahedron Lett.  2004,  45:  4461 
  • 20 Patil BS. Vasanthakumar G.-R. Sureshbabu VV. J. Org. Chem.  2003,  68:  7274 
  • 21 Sureshbabu VV. Naik SA. Hemantha HP. Narendra N. Das U. Row TNG. J. Org. Chem.  2009,  74:  5260 
  • 22 Sudarshan NS. Narendra N. Hemantha HP. Sureshbabu VV. J. Org. Chem.  2007,  72:  9804 
  • 23 Sureshbabu VV. Narendra N. Nagendra G. J. Org. Chem.  2009,  74:  153 
  • 24a Piekutowska M. Pakulski Z. Tetrahedron Lett.  2007,  48:  8482 
  • 24b Kochetkov NK. Klimov EM. Malysheva NN. Demchenko AV. Carbohydr. Res.  1992,  232:  C1 
  • 24c Pakulski Z. Pierożyński D. Zamojski A. Tetrahedron  1994,  50:  2975 
  • 25 Carpino LA. Acc. Chem. Res.  1987,  20:  401 
  • 26 Sayyahi S. Synlett  2009,  2035 
  • 27a Mondal S. Fan E. Synlett  2006,  306 
  • 27b Caputo R. Cassano E. Longobardo L. Palumbo G. Tetrahedron  1995,  51:  12337 
  • 28a Rodriguez M. Llinares M. Doulut S. Heitz A. Martinez J. Tetrahedron Lett.  1991,  32:  923 
  • 28b Kokotos G. Noula C. J. Org. Chem.  1996,  61:  6994 
  • 30a Pascal R. Sola R. Tetrahedron Lett.  1998,  39:  5031 
  • 30b

    To a solution of 2i in i-PrOH-H2O (7:3), NaOH (1.1 equiv) and CaCl2 (0.8 M) were added and the reaction mixture was stirred at room temperature until completion.

29

The HPLC chromatogram of Fmoc-Phg-ψ(CH2NCS) had a peak at t R 19.70 minutes while Fmoc-Phg-ψ(CH2SCN) eluted at t R 14.49 minutes, which confirmed the absence of the undesired isomer in the thiocyanate product.

31

The RP-HPLC spectrum of H-Ala-ψ(CH2SCN4H)(10a) had a single peak at t R 14.2 minutes. The same compound exhibited a distinct methyl group doublet in its ¹H NMR spectrum. These two observations confirmed the enantiomeric purity of the free amino tetrazole derivative.