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Description

In case of acetate aldol reaction with crimmins auxilairy 1 eq of TiCl4 + 1 eq Of base give acetate syn product and 1eq of TiCl4 + 2 eq Of base give acetate anti product (Mathis B. Hodge and Horacio F. Olivo; Tetrahedron 60 (2004) 9397–9403) but in case of propiolate aldol reaction using thiozolidenthione or oxazolidenethion 1 eq of TiCl4 + 1 eq Of base give non-evans syn product and 1eq of TiCl4 + 2 eq Of base give evans syn product. (Michael T. Crimmins,* Bryan W. King, Elie A. Tabet, and Kleem Chaudhary J. Org. Chem. 2001, 66, 894-902).

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Source Own work
Author E kwan

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Original upload log

Date/Time Dimensions User Comment
28 November 2006, 19:48:00 646 × 650 (28743 bytes) E kwan (talk · contribs) crimmins auxiliary

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Date/TimeThumbnailDimensionsUserComment
current20:48, 3 December 2014Thumbnail for version as of 20:48, 3 December 2014646 × 650 (32 KB)GifTaggerBot: Converting file to superior PNG file. (Source: Crimminsaldol1.gif). This GIF was problematic due to transparency and non-greyscale color table.

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