Hi Irv, great to meet you at the Siena conference. I think you were the one I spoke with about the quinoxaline prep. I am teaching organic lab now and are right at that experiment. A quick internet search turned up the paper I have attached. The use polyaniline sulfate as a catalyst. I am going to try it. One of my colleagues worked on polyaniline with Allen MacDiarmid at U.Penn, so he is happy.