Chapter 3, Problem 124EQ

When but-2-enal is treated with 3-phenylpropenal in the presence of a strong base, a compound is formed whose formula is C13H12O. In its 1H NMR spectrum, one signal has a chemical shift around 10 ppm, several overlapping signals have chemical shifts between 7 and 9 ppm, and several other overlapping signals have chemical shifts between 5 and 6 ppm. Integration of those sets of signals gives a 1∶5∶6 ratio.(a) What is the structure of the product?(b) Draw a complete, detailed mechanism that accounts for the formation of the product.

Describe how the addition of an  isoxazolidinone to a substrate directs the stereochemistry of a reaction.

identify and interpret the peaks and their characteristics (C=O, 4H, doublet) product name: dulcin (4-ethoxyphenylurea) (C9H12N2O2) images include CNMR, HNMR, and IR spectroscopy

Which ppm value on the 1H NMR of vanillin corresponds to the methoxy group?     3.96 ppm (singlet, 3H)     6.30 ppm (singlet, 1H)     7.04 ppm (doublet, 1H)     7.43-7.41 ppm (multiplet, 2H)     9.82 ppm (broad, singlet, 1H)

The chemical shifts of the C-2 hydrogen in the spectra of pyrrole, pyridine, and pyrrolidine are 2.82 ppm, 6.42 ppm, and 8.50 ppm. Match each heterocycle with its chemical shift.

What are the breakdown fragmentation pathways of 4-methoxyphenyl acetate?

Define the mechanism that converts a hydroxy aldehyde to a cyclic hemiacetal ?

I got to making an epoxide and organometal complex but then got confused as to what happens next with the H3O+ workup.

1.Explain what is anomeric effect and why it happens?   2.Explain how a glycosyl acetimidate can loss its glycosyl donor activity?