A Newer Short Synthesis of dl-Muscone(Ⅰ)

새로운 짧은 경로로의 dl-Muscone 합성(Ⅰ)

  • Im, D.S. (Cho Seon Pharm & Trading Co.LTD, The Institute of Life Science Resrarch) ;
  • Shin, D.H. (Cho Seon Pharm & Trading Co.LTD, The Institute of Life Science Resrarch) ;
  • Park, D.K. (Cho Seon Pharm & Trading Co.LTD, The Institute of Life Science Resrarch)
  • 임대식 (한국무약합자회사 생명과학연구소) ;
  • 신대희 (한국무약합자회사 생명과학연구소) ;
  • 박대규 (한국무약합자회사 생명과학연구소)
  • Published : 19960400

Abstract

New routes have been developed for the practical syntheses of dl-Muscone(1) employing cyclopentadecanone(2) as the starting material. In this experiment, addition of bromine to cyclopentadecanone in dried E. Ether solution with a trace of $AlCl_3$ as the catalyst were produced 2-bromocyclopentadecanone(3). This process was enhanced formation of regioselective enolate anion at $C_2$ position. 2-Bromocyclopentadecanone was put into $Li_2CO_3$-LiBr-DMF solution at 140∼150$^{\circ}C$, were produced trans- and cis-2-cyclopentadecen-1-one(4) mixture. Other by-products were reduced by control of reaction temperature and time. Trans- and cis-2-cyclopentadecen-1-one(4) mixture was directly put into dried E. Ether solvent and induce to react dropwise with $CH_3MgBr-Cu_2Cl_2$ complex, all of them got into 1,4-addition, dl-Muscone (1) was formed as the result. Conculsion, through three steps procedure from cyclopentadecanone(2) to dl-Muscone(1), the pure dl-Muscone was obtained with the high proportion of 85%, and synthetic cost was able to be much lower than any other conventional methods as there were no chemical separating steps.

Cyclopentadecanone(2)으로부터 2-cyclopentadecen-1-one(4)까지의 일반적인 합성경로는 여러가지가 있을 수 있다. 본 실험에서는 우선 $C_2$-위치의 선택적인 브롬화반응을 위하여 $AlCl_3$를 써서 엔올산 염화하여 위치선택성을 증가시켰으며, 브롬화 수소 이탈반응에서의 시약 $Li_2CO_3$-LiBr-DMF 조건을 적절히 조절함으로써 화합물(4)를 쉽게 얻을 수 있었다. 이 과정에서 생기는 트랜스형 및 시스형 화합물(4)를 E.Ether 용매속에서 $CH_3MgI-Cu_2Cl_2$ 복합체에 적하하여 반응시킬 경우, 모두 1,4-첨가반응되어 dl-Muscone(1)를 생성함을 결과로 얻었다. 본 실험에서 Cyclopentadecanone(2)으로부터 dl-Muscone(1)까지의 3단계 과정을 통해 순수한 dl-Muscone(1)을 총 85%의 높은 수율로 얻었으며, 별다른 화학적 분리단계를 거치지 않아, 합성단가를 기존의 어느 방법보다 현격히 낮출수 있었다.

Keywords

References

  1. Fragrance chemistry Mookherjee, B. D.;Wilson, R. A.;Theimer, E. T.(Ed.)
  2. Acta Theriologica Sinica v.11 Yin, S.;Dai, W.
  3. Acta Pharmaceutica Sinica v.15 Yu. D.
  4. ほか藥誌 v.98 久保喜一
  5. Eur. Pat. Appl. EP15412 800917 Buchi, G. H.;Wuest, H.
  6. Biochem. Pharmacol v.36 Tanaka, E.;Kurata, N.;Kohno. M.;Yoshida, T.;Kuroiwa, T.
  7. Gen. Pharmacol v.18 no.3 Morishita, S. I.;Mishima, Y.;Shoji, M.
  8. J. Exp. Med. v.15 Takayama, Y.
  9. ほか 和漢醫學會誌 v.3 木村正康
  10. Helv. Chim. Acta v.9 Ruzicka, L.
  11. Helv. Chim. Acta v.17 Ruzicka, L.;Stoll, M.
  12. Liebigs Ann. Chem. v.512 Ziegler, K.;Weber, K.
  13. Arkiv Kemi v.3 Stallberg-Steahagen, S.
  14. Helv. Chim, Acta v.54 no.8 Felix, D.;Schreiber, T.;Ohloff, G.
  15. J. Chem. Soc., Chem. Commun. Tanaka, K.;Suziki, H.
  16. Jpn. Kokai. Tokko Koho JP04139 A2 Seiichi, I.;Kikumasa, S.;Hirohito, O
  17. J. Am. Chem. Soc. v.115 Oppolzer, W.;Radinov, R. N.
  18. Purification of Laboratory Chemicals, (2nd Ed.) Perrin, D. D.;Armarego, W. L.
  19. Fr. Demande FR2645530 A1 901012 Snowden, R. L.;Rautenstrauch, V.
  20. J. Org. Chem. v.51 Nelson, K. A.;Mash, E. A.
  21. J. Am. Chem. Soc. v.87 Corey, E. J.;Horfmann, A. G.
  22. J. Org. Chem. v.36 Mookherjee, B. D.;Patal, R. R.;Ledig, W. O.