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Volumn 9, Issue 2, 2007, Pages 193-196

Phase-switch synthesis with boronic acids as productive tags

Author keywords

[No Author keywords available]

Indexed keywords

BORONIC ACID DERIVATIVE; PEPTIDE;

EID: 34047241282     PISSN: 15204766     EISSN: None     Source Type: Journal    
DOI: 10.1021/cc060149s     Document Type: Article
Times cited : (27)

References (39)
  • 5
    • 0037835827 scopus 로고    scopus 로고
    • For a review of fluorous synthesis, see
    • (b) For a review of fluorous synthesis, see: Zhang, W. Tetrahedron 2003, 59, 4475-4489.
    • (2003) Tetrahedron , vol.59 , pp. 4475-4489
    • Zhang, W.1
  • 33
    • 34047211346 scopus 로고    scopus 로고
    • General phase-s witching cycle with DEAM-PS. Immobilization: When the reaction is complete according to TLC analysis, the reaction mixture (at ambient temperature) is filtered to remove any precipitates. The filtrate is added to a polypropylene (pp) vessel charged with DEAM-PS resin (2 mol equiv, 2-3 mmol/g, The pp vessel is gently shaken by hand until all the resin is suspended in solution; then it is vortexed at room temperature for one hour. The pp vessel is then drained, and the resin is washed thoroughly with THF (3x) and dichloromethane (3x, Cleavage: The resin-bound boronic acid-tagged product is cleaved by vortexing the resin in 5% H2O/THF for one hour. The solution is drained, and the resin is washed with a 5% H2O/THF solution 3x, The filtrates are combined, concentrated under reduced pressure, and dried under high vacuum to yield the product
    • 2O/THF solution (3x). The filtrates are combined, concentrated under reduced pressure, and dried under high vacuum to yield the product.
  • 36
    • 0011096689 scopus 로고    scopus 로고
    • A related cross-coupling/detagging was reported on a fluorous boronate, see: Chen, D.; Qing, F.-L; Huang, Y. Org. Lett. 2002, 4, 1003-1005. In this case, however, the required fluorous tag is not commercial, needs to be prepared in several steps, and does not circumvent the attachment step as with the free boronic acids used in the DEAM-PS system.
    • A related cross-coupling/detagging was reported on a fluorous boronate, see: Chen, D.; Qing, F.-L; Huang, Y. Org. Lett. 2002, 4, 1003-1005. In this case, however, the required fluorous tag is not commercial, needs to be prepared in several steps, and does not circumvent the attachment step as with the free boronic acids used in the DEAM-PS system.
  • 37
    • 0037184891 scopus 로고    scopus 로고
    • For an approach based on homogeneous polyglycerol, which also requires a separate immobilization operation, see
    • For an approach based on homogeneous polyglycerol, which also requires a separate immobilization operation, see: Hebel, A.; Haag, R. J. Org. Chem. 2002, 67, 9452-9455.
    • (2002) J. Org. Chem , vol.67 , pp. 9452-9455
    • Hebel, A.1    Haag, R.2
  • 39
    • 0347653033 scopus 로고    scopus 로고
    • For a microwave-promoted procedure, see
    • For a microwave-promoted procedure, see: McLean, N. J.; Tye, H.; Whittaker, M. Tetrahedron Lett. 2004, 45, 993-995.
    • (2004) Tetrahedron Lett , vol.45 , pp. 993-995
    • McLean, N.J.1    Tye, H.2    Whittaker, M.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.