ONE-POT SYNTHESIS OF BENZISOINDOLENINES USED IN THE PREPARATION OF NAPHTHALOCYANINES
First Claim
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1. A method of effecting a one-pot conversion of a tetrahydronaphthalic anhydride of formula (I):
- to a nitrate salt of a benzisoindolenine of formula (II);
said method comprising heating said tetrahydronaphthalic anhydride of formula (I) with a reagent mixture comprising ammonium nitrate so as to effecting concomitant dehydrogenation during the conversion, wherein;
R1, R2, R3 and R4 are each independently selected from the group consisting of;
hydrogen, hydroxyl, C1-20 alkyl, C1-20 alkoxy, amino, C1-20alkylamino, di(C1-20alkyl)amino, halogen, cyano, thiol, C1-20 alkylthio, nitro, C1-20 alkylcarboxy, C1-20 alkylcarbonyl, C1-20 alkoxycarbonyl, C1-20 alkylcarbonyloxy, C1-20alkylcarbonylamino, C5-20 aryl, C5-20 arylalkyl, C5-20 aryloxy, C5-20 arylalkoxy, C5-20heteroaryl, C5-20heteroaryloxy, C5-20heteroarylalkoxy and C5-20 heteroarylalkyl.
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Abstract
A method of effecting a one-pot conversion of a tetrahydronaphthalic anhydride of formula (I):
to a nitrate salt of a benzisoindolenine of formula (II):
The method comprises heating the tetrahydronaphthalic anhydride of formula (I) with a reagent mixture comprising ammonium nitrate so as to effecting concomitant dehydrogenation during the conversion.
14 Citations
13 Claims
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1. A method of effecting a one-pot conversion of a tetrahydronaphthalic anhydride of formula (I):
-
to a nitrate salt of a benzisoindolenine of formula (II); said method comprising heating said tetrahydronaphthalic anhydride of formula (I) with a reagent mixture comprising ammonium nitrate so as to effecting concomitant dehydrogenation during the conversion, wherein; R1, R2, R3 and R4 are each independently selected from the group consisting of;
hydrogen, hydroxyl, C1-20 alkyl, C1-20 alkoxy, amino, C1-20alkylamino, di(C1-20alkyl)amino, halogen, cyano, thiol, C1-20 alkylthio, nitro, C1-20 alkylcarboxy, C1-20 alkylcarbonyl, C1-20 alkoxycarbonyl, C1-20 alkylcarbonyloxy, C1-20alkylcarbonylamino, C5-20 aryl, C5-20 arylalkyl, C5-20 aryloxy, C5-20 arylalkoxy, C5-20heteroaryl, C5-20heteroaryloxy, C5-20heteroarylalkoxy and C5-20 heteroarylalkyl.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
wherein; M is absent or selected from Si(A1)(A2), Ge(A1)(A2), Ga(A1), Mg, Al(A1), TiO, Ti(A1)(A2), ZrO, Zr(A1)(A2), VO, V(A1)(A2), Mn, Mn(A1), Fe, Fe(A1), Co, Ni, Cu, Zn, Sn, Sn(A1)(A2), Pb, Pb(A1)(A2), Pd and Pt; A1 and A2 are axial ligands, which may be the same or different, and are selected from —
OH, halogen or —
ORq;Rq is selected from C1-16 alkyl, C5-20 aryl, C5-20 arylalkyl, C1-20 alkylcarbonyl, C1-20 alkoxycarbonyl or Si(Rx)(Ry)(Rz); and Rx, Ry and Rz may be the same or different and are selected from C1-20 alkyl, C5-20 aryl, C5-20 arylalkyl, C1-20 alkoxy, C5-20 aryloxy or C5-20 arylalkoxy.
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12. The method of claim 11, wherein M is Ga(A1).
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13. The method of claim 11, wherein macrocyclizing step comprises heating said benzisoindolenine of formula (II) in the presence of GaCl3.
Specification