... Downloading zip file containing 3 articles... JavaScript is disabled on your browser. Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 31, Issue 2, 1990, Pages 271–274. Cover image Cover image. Stereocontrolled approaches to the key intermediate of 1β-methylthienamycin. ... J. Org. Chem., 52 (1987), p. 2963. 9; C. Gennari, PC Cozzi; Tetrahedron, 44 (1988), p. 5965. ...