Crystal and Molecular Structure of 2,3-Tetramethylen-3,4-dihydroquinazoline

Synthesis and structure of 6-bromo-4-hydroxy-2,3-tetramethylene-3,4-dihydroquinazoline and its mixed crystal with 4-hydroxy-2,3-tetramethylene-3,4-dihydroquinazoline

“…However, a similar twist was not observed in other known tricyclic quinazolines that do not form such associates. In particular, this angle was only 3.5° in 2,3-tetramethylene-3,4-dihydroquinazoline hydrochloride dihydrate [5].…”

Tricyclic Quinazoline Alkaloids: Isolation, Synthesis, Chemical Modification, and Biological Activity

“…X-ray crystal structures and spectral and quantum-chemical studies of tricyclic quinazoline alkaloids as the bases and various salts were reported [155][156][157][158][159][160][161][162][163][164][165][166].…”

11-(2-Oxopyrrolidin-1-ylmethyl)-1,2,3,4,5,6,11,11a-octahydropyrido[2,1-b]quinazolin-6-one dihydrate

“…For general background to pyrido-quinazoline alkaloids and their structures, see: Fitzgerald et al (1966); Tashkhodzhaev et al (1995); Turgunov et al (2003); Tozhiboev et al (2007). For the synthesis of pyrido-quinazolinone derivatives, see: Shakhidoyatov (1983); Barakat (1998).…”