... to an acyl group in compound 5 (Scheme 2). The methoxymethyl derivative Sa was cleaved by sulfuryl chloride to give the a-chloromethyl ether 6a whereas in the 12 Acts Chemica Scandinavica 46 (1992) CROSS ... Benneche, T., Strande, P. and Wiggen, U. Acta Chem. ... Chem. ...