1. W. J. le Noble, elsewhere in this volume.
2. Matsumoto has written several extensive and thorough reviews specifically on the topic of synthesis at high pressure; thus, see K. Matsumoto, T. Uchida, and R. M. Acheson, Heterocycles 16, 1367 (1981);
3. K. Matsumoto, A. Sera, and T. Uchida, Synthesis, 1 (1985);
4. K. Matsumoto and A. Sera, ibid., 999 (1985). References to the reviews on the mechanistic aspects may be found here and in Ref. 1.
5. Y. Okamoto and Y. Shimagawa, Tetrahedron Lett., 317 (1966).