Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Asymmetric synthesis of indoloquinolizidine has been accomplished by using acyl pyridinium salt bearing in 3 position a chiral aminal. ... ,in: Atta-Ur-Rahman (Ed.), Studies in Natural Product Synthesis, 1Elsevier, Amsterdam (1988), p. 89 and references herein.