name the major product for the reaction of 4-methyl-1-pentyne with the following reagents  2 mol Br2/CH2Cl2  R2BH in THF followed by H2O2/HO-/H2O  H2/Lindlar catalyst

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For each of the following, identify the product (represented by A and B) that would be formed through the indicated sequence of steps from the given starting material. Show ALL the products' structures along the way for each step. 1) NBS, ROOR, A 2) H₂, (Pd/C) 3) KOt-Bu, t-BuOH A

Provide the Major product for the following addition reactions

Provide the structure of the major organic product of the following reaction and? explain the stereochemistry which results in this product. 2-Pentanol reacting with 1.) PBr3, pyridine 2.) NaCN

Provide the structure of the two organic product(s) which results when 2-bromo-2-methylbutane is treated with sodium ethoxide.

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2) Predict the product(s) for the following reactions. O C6H5CCH3 + CH₂=CHCC6H5 O + (CH3)₂C=CHCH LDA, THE NaOH, H₂O