Place reagent combinations in the out to successfully carry the following transformation. ? Ph Ph 1st reagent combinatia 2nd 3rd 4th correct order k sodium azide lithium aluminum acetaldehyde sodium cyanoboro hydride
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- Step 2: A hemiacetal formation has a similar mechanism to the hydrate reaction, except 1 equivalent of alcohol is added instead of water. 1² R₂ R₁ LOR3 R₁ R₂ The hemiacetal reaction is also reversible and can also be catalyzed by either acid or base. Hemiacetals are not usually isolated, except in the formation of 5- and 6-membered rings, as often seen in carbohydrate chemistry. Identify the hemiacetal formed from the intramolecular cyclization of the molecule shown. OH H OH R3OH OH OH OH CH₂OH NaOH ?Which reagent(s) would accomplish the synthesis showWn below? NH2 NH2 но. H3CO. A) NaBH4 В) РСС C) LAH D) Na2Cr207 / H2SO4 E) NAOH www wIdentify the suitable reagents for the given reaction and arrange them accordingly. OH A+&+F OEt 1 2 OEt OEt 1) EtOH, H₂SO4; 2) EtOH, H₂SO4 1) EtONa followed by H₂O; 2) TsCl/py followed by EtONa 1) EtONa followed by H₂O; 2) NaH followed by EtBr O 1) EtOH, H₂SO4; 2) NaH followed by EtBr O 1) EtOH, H₂SO4; 2) TsCmy followed by EtONa
- What is the likley product of the reaction sequence shown? MgBr MgBr ОН РСС H2O K,Cr207/H2SO/H2O H,O CH2ČI2 ether ether ОН HO || II IV V O II O IV O vRank the following compounds from MOST react Mucieophilic acyl substitution. Enter the number 1 in the and number 3 in the box under the least reactive compou om bajada! 517 om oonuod O ofque ex Explain why 1 is more reactive compared to 2Google hil Identify the reagents X in the following scheme OH NABH4 with H30+ KMN04 with H30+ All are correct O Na2Cr207 with H30+ O all are incorrect
- 10) Which of the following is (2R, 3S)-2,3-pentanediol? он он он он Он он он ÕH он A B DMatch the reagents to the product shown in each reaction. A B D OH F CI D B [Choose ] SOCI2 C 2 eq (CH3)2NH 2 eq CH3NH2 H2O нс, н20 СН3ОН 2q NH3 CH3COO- HCI, CH3OH NH₂ # SOHThe products of acidic cleavage of Ethyl isopropyl ether by Hl are: O Al Isopropyl iodide and Ethanol Bi lsapropanol and lodoethane CHisopropane and Ethane DI Mixture of both A and B
- Identify the missing reagent, 1) ???? 2) NaCN OH CN O PB13 O TSCI (Ts: Tosyl) O CISIME3 (Trimethyl silyl chloride) socI2 O sOCi2Scheme 4 Thsan em quion on 121421 ONOT p o ont ra This ian questen OHposteto e servis onKOH, HO Et,0, 0 °C a ici Nw arvices MEOH, Et,0 NH2 Q27 Q28 ana Do NOT posa ko arervoes N2 an exam queston on 1241 Do NOT p NH,COOH Problem 4 Q29. Provide a reasonable synthetic scheme with reagents to convert 2- butanone into an aminobenzoate. No electron pushing mechanism is required. Just show reagents and synthesis intermediates. This is an esem queston on 12421 Do N posentre seo Th is an 12 n o m Nan ONaT servs Thean m qon on 121421 De NOT os n The exam queston on 121421 Do NOT postto ore servicesMelamine, used as a fire retardant and a component of the writing surface of white boards, can be prepared from s-trichlorotriazine through a series of SNAr reactions with ammonia. The first substitution takes place rapidly at room temperature. The second substitution takes place near 100 °C, and the third substitution requires even higher temperature and pressure. Provide an explanation fatr this reactivity.