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Volumn 30, Issue 52, 1989, Pages 7457-7460

Asymmetric synthesis of protected α-fluoroglycines

Author keywords

[No Author keywords available]

Indexed keywords

ALPHA FLUOROGLYCINE; UNCLASSIFIED DRUG;

EID: 0024801742     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(00)70724-6     Document Type: Article
Times cited : (32)

References (13)
  • 3
    • 84919121287 scopus 로고    scopus 로고
    • Although most amines are predominantly protonated at pH < 9, it is likely that the presence of small amounts of free amine in equilibrium would cause decomposition of α-fluoroamines at most pHs.
  • 7
    • 84919121286 scopus 로고    scopus 로고
    • All compounds were homogeneous by HPLC and/or TLC, and showed satisfactory spectral data including high resolution mass spectra.
  • 8
    • 84919121285 scopus 로고    scopus 로고
    • 11FINO, M = 307.1, monoclinic, [[Truncated]]
  • 9
    • 84919121284 scopus 로고    scopus 로고
    • The crude α-fluoroglycine derivatives (5a) and (5b) were always contaminated with ca. 15% of their epimers [i.e. crude (5a) contained ca. 15% of (5b) and vice versa]. As small amounts of recovered starting materials showed 0% d.e. [i.e. equal amounts of (4a) and (4b)], we concluded that iodide generated during the reaction caused some epimerisation of the starting material.
  • 10
    • 84981777592 scopus 로고
    • The Gabriel Synthesis of Primary Amines
    • N2 pathway, leading to inversion of configuration - see, Int. Ed., (especially pp. 920-921, and references therein). As the auxiliary did not influence the stereochemical outcome of the reaction [i.e. (4a)→(4b) but (4b)→(5b)], and as there are no reported cases of retention of configuration from similar Gabriel transformations, it seems certain that inversion must have occurred.
    • (1968) Angewandte Chemie International Edition in English , vol.7 , pp. 919
    • Gibson1    Bradshaw2
  • 11
    • 84919121283 scopus 로고    scopus 로고
    • i.e. Inversion, although the R/S notation is unaltered because of priority rules.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.