1. Two general synthetic methods were developed for the preparation of these compounds. 2. Critically evaluates the preparative applicability and significance of the synthetic methods . 3. Moreover, a synthetist who believes and practices synthetic methods or principles. 4. The dry synthetic method is usually performed using a thermal technique. 5. One synthetic method is based on Skraup synthesis and Paal-Knorr synthesis. 6. Other synthetic methods include the condensation reactions of organic-substituted phosphoranimines. 7. There are other synthetic methods that can start with plant matter, see Fischer-Tropsch process ). 8. The analytical method is simpler than the synthetic method . 9. He invented a new hydrogen thermometer; measured the synthetic methods in organic chemistry, the Friedel-Crafts reaction. 10. Whereas fully synthetic methods have been devised from the starting material of vinylcarbenoids & pyrroles .)