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Table <strong>of</strong> Contents LXI<br />

17.7.3.2 [2.3.3]Cyclazinones ...................................................... 1049<br />

17.7.3.2.1 Synthesis by Ring-Closure Reactions ...................................... 1049<br />

17.7.3.2.1.1 By Formation <strong>of</strong> Two C—C Bonds ......................................... 1049<br />

17.7.3.2.1.1.1 Method 1: [8p +3p]-Cycloaddition Reaction <strong>of</strong> a Pyrrolo[1,2-c]pyrimidine<br />

with 1,3-Dibromo-1,3-diphenylacetone .................... 1049<br />

17.7.3.2.1.1.2 Method 2: Cycloaddition <strong>of</strong> 3-Hydroxyquinolizinylium Bromide with<br />

Acetylene Derivatives .................................... 1050<br />

17.7.3.2.1.2 By Formation <strong>of</strong> One C—C Bond .......................................... 1050<br />

17.7.3.2.1.2.1 Method 1: Intramolecular Condensation <strong>of</strong> an Indolizine .............. 1050<br />

17.7.3.2.1.2.2 Method 2: Hydrolysis <strong>of</strong> an Indolizine with Hydrochloric Acid Followed by<br />

Treatment with Alumina .................................. 1051<br />

17.7.3.2.1.2.3 Method 3: Intramolecular Cyclization <strong>of</strong> a Quinolizine Ester Followed<br />

by De-ethoxycarbonylation ............................... 1052<br />

17.7.3.2.2 Synthesis by Substituent Modification .................................... 1053<br />

17.7.3.2.2.1 Substitution <strong>of</strong> Existing Substituents ...................................... 1053<br />

17.7.3.2.2.1.1 Of Carbon Functionalities ................................................ 1053<br />

17.7.3.2.2.1.1.1 Method 1: Hydrolysis <strong>of</strong> a Pyrroloquinolizine Using Hydrochloric Acid<br />

Followed by Decarboxylation Using Copper(I) Oxide ....... 1053<br />

17.7.3.3 Benzo-Fused [2.3.3]Cyclazines ........................................... 1053<br />

17.7.3.3.1 Synthesis by Ring-Closure Reactions ...................................... 1054<br />

17.7.3.3.1.1 By Formation <strong>of</strong> Two C—C Bonds ......................................... 1054<br />

17.7.3.3.1.1.1 Method 1: From N-[2,6-Bis(2-phenyl-1,3-dithian-2-yl)phenyl]-1H-pyrrole<br />

Using Mercury(II) Chloride ................................ 1054<br />

17.7.3.3.1.2 By Formation <strong>of</strong> One C—C Bond .......................................... 1054<br />

17.7.3.3.1.2.1 Method 1: Reaction <strong>of</strong> a Formamide with Polyphosphoric Acid ........ 1054<br />

17.7.3.4 Polyheteroaza[2.3.3]cyclazines ........................................... 1055<br />

17.7.3.4.1 Synthesis by Ring-Closure Reactions ...................................... 1056<br />

17.7.3.4.1.1 By Formation <strong>of</strong> Three N—C Bonds ........................................ 1056<br />

17.7.3.4.1.1.1 Method 1: Reaction <strong>of</strong> a Cyanoacrylate with Formic Acid ............. 1056<br />

17.7.3.4.1.2 By Formation <strong>of</strong> One N—C and One C—C Bond ............................ 1056<br />

17.7.3.4.1.2.1 Method 1: Reaction <strong>of</strong> a Diacetamide with Phosphoryl Chloride ....... 1056<br />

17.7.4 Product Subclass 4: [3.3.3]Cyclazines (Pyrido[2,1,6-de]quinolizines)<br />

and Related Compounds ................................................ 1057<br />

17.7.4.1 [3.3.3]Cyclazine (Pyrido[2,1,6-de]quinolizine) ............................. 1058<br />

17.7.4.1.1 Synthesis by Ring-Closure Reactions ...................................... 1058<br />

17.7.4.1.1.1 By Formation <strong>of</strong> Two C—C Bonds ......................................... 1058<br />

17.7.4.1.1.1.1 Method 1: Reaction <strong>of</strong> Quinolizin-4-ylideneacetate with an<br />

Acetylenecarboxylate .................................... 1058

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