The Synthesis of 1',9-Dimethyl-1,2-Benzanthracene

peri Interaction in Naphthalene Derivatives

“…The carboxyl group in the benzene ring may be twisted away from the vicinity of the naphthalene ring, thus precluding ring closure (129). However, the partially saturated acid CXLIV is found to undergo smooth cyclization in high yields to CXLV on treatment with hydrogen fluoride or acetic anhydride-acetic acid (130). The peri hindrance to cyclization so effective in CXLIII appears to have been overcome in CXLIV.…”

“…Several reports (130,445,446,450,463,465,537) are available in the literature concerning the complex formation of other related systems like 4,5-substituted phenanthrenes (LXV), 1,2-benzanthracenes (LXVI), and benzo [c ]phenanthrenes (LXVII). The available data do not seem to permit any generalization of the complexing behavior in terms of steric or electronic fac-…”

Archaeology of the Brasada: A Cultural Resources Assessment of the Chevron Resources Company Properties in Northeastern Duval County, Texas

“…The first major project in south Texas involving a systematic design of survey, testing, and excavation was completed at Falcon Reservoir in Zapata and Starr Counties (Hartle and Stephenson 1951;Cason 1952;Jelks 1952Jelks , 1953.…”