draw out the mechanism of the following reaction. be sure to draw all intermediates and use arrows to show the flow of electrons: GTP + IMP + L-Asp-> GDP + phosphate + N6-(1,2-dicarboxyethyl) - AMP

Look at the reaction given, the product is 9,10-anthraquinone. Please draw a mechanism for another possible structure from the reaction, emodin. -OH IL,SO, A C

Explain this Organic Synthesis with Enolates.

9. Draw an arrow pushing mechanism for the following reaction. You may use generic HA and A: as needed to carry out proton transfer steps. HO HO OH OH OH Yoga fyty (2 equiv) H+ HO

Please write the full mechanism of the following reaction

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4. Pyridoxal Phosphate Reaction Mechanisma Threonine can be broken down by the enzyme threonine dehydratase, which catalyzes the conversion of threonine to alpha:ketobutzrate, and ammonia. The enzyme uses PLP as a cofactor. Suggest a mechanism for this reaction, based on the mechanisms in Figure 18-6. Note that this reaction includes an elimination at the betta carbon of threonine. OH NH, PLP threonine dehydratase CH-CH-CHCOO- CH-CH-C-COO + NH, + H,0 Threonine a-Ketobutyrate

17). What is the product of the following Acetoacetic Ester Synthesis? glan gem (A) OH OEt 1). 1 eqiv. NaOEt 2). 1 equiv. CH3CH₂Br (B) CH3 (C) .OH CH3 3). H3O+, then Heat (D) (E) OEt HO OEt

3. Propose a mechanism for the following Aldol addition and beta elimination. 1) 1.1 equiv LDA, -78C 2) To the H 3) H3O+, heat