... 9 Carbamoylmethyl Radical Cyclization: Formal Synthesis of (—)-Trachelanthamidine Tatsunori SATo, Katsuhiro TSUJIMOTO, Ken-ichiro MATSUBAYASHI, Hiroyuki ISHIBASHI, and ... W.-M. Dai, Y. Nagao, and E. Fujita, Heteroeyeles, 30, 1231 (1990); M. Ikeda, T. Sato, and H ...