Yttrium triflate as an efficient and useful catalyst for chemoselective protection of carbonyl compounds

Tetrahedron Letters

Volumn 45, Issue 11, 2004, Pages 2339-2341

  De, Surya Kanta ^a  

^a UNIVERSITY OF WASHINGTON   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ALKANE DERIVATIVE; CARBONYL DERIVATIVE; MERCAPTOETHANOL; THIOL DERIVATIVE; YTTRIUM;

ARTICLE; CATALYST; INFRARED SPECTROSCOPY; MASS SPECTROMETRY; PROTON NUCLEAR MAGNETIC RESONANCE; STEREOCHEMISTRY;

EID: 1242315559     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2004.01.106     Document Type: Article

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28. 3) δ 1.86-1.98 (m, 1H), 2.10-2.18 (m, 1H), 2.85-2.95 (m, 2H), 2.98-3.10 (m, 2H), 3.79 (s, 3H), 5.13 (s, 1H), 6.86 (d, J=8.5 Hz, 2H), 7.39 (d, J=8.5 Hz, 2H). The aqueous layer containing the catalyst could be evaporated under reduced pressure to give a white solid. The IR spectrum of the recovered catalyst was identical to that of the commercially available catalyst (Aldrich), which could be reused for the next thioacetalyzation reaction, without losing any significant activity (Table 1, entries 2 and 21).