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- (ii) Draw the product R, including a detailed reaction mechanism for the conjugate addition reaction between the 1,3-dicarbonyl P and the a,ß-unsaturated ketone Q. Eto P OEt + Q OEt Et3N R (iv) Explain why conjugate addition is favoured over direct addition to Q in this case.7 Draw the structure of the product, substrate or condition in the following reactions (should clearly indicate the stereochemistry). (a) Mẹ 1) Os04 2) NaHŠO3 (b) 1) (sia)2BH 2) NaOH/H2O2 H2O (c) Он (d) Br2 Br Н ÕH6. Complete reaction scheme below indicating reagents, catalysts and conditions, and side product trigil bezinslog si6101fon 290b 1l (b Senines levirba 6 gaubong nasamots gniwollot ads to doinW 01 sniowl (6 CH3 40 CH3 Scansgowi (d Ege nodie) ( nsgyxo (b NO₂ 19m02 2i gniwollet sits to mainW II HO
- 5. a) When the molecule below is treated with HCI, the product distribution shown is obtained. Use curved arrow formalism to draw a mechanism for this process. Account for the product distribution and draw resonance structures for the intermediate that leads to the major product. The m HCI CI + s 1o(29nil no awa eib ys leldwsio (2tniog 01).E (15 % CI2 tw ledsl< 1% lad olualom 85 %7В. (2 Draw the structure of the product, substrate or condition in the following reactions (should clearly indicate the stereochemistry). (а) OH (b) OsO vaHSO3 (c) 1) (sia)2 BH 2) NaOH/H,O2 H20 (d) HBr (2 equiv) Br, Br Hint: This is the only product formed (e) Br Br2 H20 OH (f)Draw the predicted major products of the following reactions. Ph OHC., (PhP);RhCI PHCN, A H,CCH, Grubbs I, CH,OCl, Rh(CO),CI CO R-0 B(OH)2 Pd(OAc)2 K3PO4 Pd(OAc)2 K3PO4
- Provide the products for the reactions shown below. Suggest a reasonable mechanism (show electron flow or provide a brief explanation) to account for each step, paying attention to stereochemical details. (a) OBn 1. EtO)2CO, NaOEt 2. H* 3. H₂O*, heat 1. NaH, THF 2. Br, THFshow products and mechanism for reaction below: ** TOI Unell TOnmation (а) Pd(PPH3)4 OMe Etz N (b) P(Et)3 Rh CH2-Ph OC. (3) H (1, (Et) P 2) mild heat (c) CO OCI. Co Ph3P H2 and CO Phfonmetion of 3+ (a) The coX (NH3)5 and SCN differ by NO more than a fuctor rate con5tunt for the 12t from forx-Ge, B2 Ng of two.eehat is the mechanism of Substitution?