Master Organic Chemistry

Alkynes Are A Blank Canvas

June 24, 2013 By James Ashenhurst 1 Comment

Now that we've gone through all the major reactions of alkynes, we can take a step back and look at the big picture. There are lots of reactions of alkynes. So what? you might ask. In this post I will try to convince you that alkynes are really useful building blocks for synthesizing a large variety … [Read more...]

Filed Under: Alkanes, Alkenes, Alkynes, Organic Chemistry 1, Synthesis Tagged With: alkenes, alkynes, bromination, dihydroxylation, hydrogenation, lindlar, sodium in ammonia, synthesis

Alkene Addition Pattern #3: The “Concerted” Pathway

April 2, 2013 By James Ashenhurst 3 Comments

In contrast to alkene addition reactions in the Carbocation Pathway and the 3-Membered Ring Pathway, we saw in the last two posts that hydroboration of alkenes is anomalous. The regioselectivity of the reaction is "anti-Markovnikov" and the stereochemistry of the addition is "syn": We also … [Read more...]

Filed Under: AlkeneCC, Alkenes, Organic Chemistry 1, Organic Reactions, Stereochemistry Tagged With: addition, ch2i2, cyclopropanation, dichlorocarbene, dihydroxylation, epoxidation, hydroboration, hydrogenation, mCPBA, osmylation, oso4, simmons smith, zn-cu

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