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What is the endo-selectivity of Diels-Alder reactions? If the diene used in the Diels-Alder reaction has asymmetric substituents at the end carbons, and if the dienophile is unsymmetric, then two different isomers of the final adduct can form. The isomer, where the functional group(s) (usually carbonyl) on the alkene end up on the same side as the newly ...

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Oxidation of alkene to 1,2-syn-diol by cold basic $\ce{KMnO4}$ is a common classification test for alkene in undergraduate organic chemistry laboratory courses. OP had correctly recognized that this reaction is a case of syn-dihydroxylation, and OP's conclusion of the product to be meso is also correct since the alkene in hand is a cis-but-2-ene. The ...

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I do not have the recent or the fifth edition of Advanced Organic Chemistry: Part B but have the forth edition (Ref.1) to answer this question. First, this book is not for for studying stereochemistry, but for studying reactions used in synthesis. In that category, this book can't be a bad book because al most all universities in US use this book for ...

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Mechanism I developed from the paper @user55119 graciously provided. Appreciate it! Any refinements I appreciate. :)

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