The pyrocondensation of the pyridine sequence

[1] BLAU, 1889, MONATSCH, V10, P378

[2] ROTH, 1886, BER, V19, P360

[3] SKRAUP, 1883, MONATSCH, V4, P591

[4] SKRAUP, 1882, MONATSCH, V3, P599

[5] WEIDEL, 1882, MONATSH, V3, P855

[6] WILLSTATTER, 1910, ANN CHEM, V378, P149

[7] 1910, BER, V43, P419

[8] 1916, MONATSH, V37, P681

[9] 1917, MONATSH, V38, P343

[10] 1917, MONATSH, V38, P141

[1] BLAU, 1889, MONATSCH, V10, P378

[2] ROTH, 1886, BER, V19, P360

[3] SKRAUP, 1883, MONATSCH, V4, P591

[4] SKRAUP, 1882, MONATSCH, V3, P599

[5] WEIDEL, 1882, MONATSH, V3, P855

[6] WILLSTATTER, 1910, ANN CHEM, V378, P149

[7] 1910, BER, V43, P419

[8] 1916, MONATSH, V37, P681

[9] 1917, MONATSH, V38, P343

[10] 1917, MONATSH, V38, P141