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. ... 2,6-di- and 2,4,6-tri-benzyloxybenzaldehydes are converted to the respective octa- and dodeca-benzyloxy porphyrins in 9–52% yields via the two-step one-flask room-temperature porphyrin synthesis. ... Octa-benzyloxy-porphyrins and dodeca-benzyloxy-porphyrins are prepared ...