Abstract
A new, efficient and convenient approach to the synthesis of
new extended angular fused aza-heterocycles including dibenzacridine
and naphth[2,3-a :2′,3′-j ]acridine units with good luminescent
properties is described. The multicomponent reactions (MCRs) were
conducted by reacting readily available and inexpensive starting
materials using thiosalicylic acid as a catalyst under microwave
irradiation. A total of 14 examples were examined, and a broad substrate
scope and high overall yields (72-89%) were revealed.
Key words
microwave irradiation - multicomponent reaction - dibenzacridines - naphth[2,3-a :2′,3′-j ]acridines
References
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15 Single-crystal growth was carried
out in N ,N -dimethyl-formamide
at room temperature. X-ray crystallographic analysis was performed
with a Siemens SMART CCD and a Semens P4 diffractometer. Crystal
data for 4h (CCDC 793729): C28 H19 NO2 ;
crystal dimensions 0.18 × 0.12 × 0.10 mm;
monoclinic; space group P2 (1)/n; a = 9.4920
(11) Å, b = 11.2767
(16) Å, c = 18.883
(2) Å, α = 90˚, β = 102.650 (2)˚, γ = 90˚; V = 1972.1
(4) ų ; Mr = 401.44; Z = 4; Dc = 1.352 g/cm³ ; λ = 0.71073 Å; µ (MoKα ) = 0.085
mm-¹ ; F (000) = 840, R
1 = 0.1032, wR
2 = 0.0544.
