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Tam's OChemII - 19.2

Preparation of Alds and Kets

AB
Making an Ald from a PRIMARY ALCOHOL...use PCC in dichloromethane
Making an ald from an ALKENE (With at least one vinylic H)...use O3 /// Zn, CH3CO2H
oxidative cleavage of a cyclic alkene will yield...a dicarbonyl compound, that isn't in a ring anymore
The ways to form an ald are...from prim alcs, from alkenes, reduce from carb acid
To create an ald from a CA...1. DIBAH, toluene solution, -78(o) C /// 2. H3O+
To create a ket from a secondary alcohol...various reagents, like PCC///CH2Cl2
To prepare a ket from an alkeneworks if one of the unsaturated C's is disubstituted, use O3///Zn, H3O+, yields a blah ketone and a H2C=O in this case
To prepare a ket from an aryl compound and an acid chlorideFRIEDEL-CRAFTS! circle thing + CH3C(=O)Cl and the reagent is AlCl3(cat)///heat, attaches it at the Cl
To make a methyl ketone...H3O+///HgSO4 (catalyst)
a methyl ketone is...blahblahblahC(=O)-CH3
Ketones can also be made from CAs like...(CH3)2Cu-Li+ /// Ether
The ways to make a ketone are...from secondary alcohols, with ozone if double subst'd, F-C acylation of an aromatic ring, hydration of a terminal alkyne, from CA's


IPC, Earth/Space Science & AP Environmental Science Instructor
Friendswood High School
Friendswood, TX

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