Identify the letters A-E. Letter A= HBr Letter B= tbOK Letter C= H3O+ Letter D= Letter E= H₂C CH3 CH3 A H₂C H₂C Br CH3 E= name B xs NaNH, CI H₂C H₂C CH3 D CI CH3 C CH3 H₂C H₂C OH CH3

The name of the following compound is: CI HN CH₂

c) CH3Cl NH AlCl3

1. You have the tools to accomplish one of the early synthesis of a major alkaloid. Porantherine (molecule M) is the main alkaloid of the low woody shrub Poranthera corymbosa distributed in the southwest. The following questions pertain to the attached synthetic scheme (J. Am. Chem. Soc. 1974, 96, 6516). The are key steps that utilize an aldol-like mechanism to close three rings (A) What kind of transformation is the D → E step; show NO mechanism, but what was added to D? Hint: molecule E clearly has a terminal alkene and ketone, but what is the third functional group (it's not another alkene)? You've done the mechanism for making this functional group in chapter 20. (B) The E F transformation is rather elegant and it is promoted by an acid (toluenesulfonic acid). It involves formation of an enol (tautomerization) followed by protonation on the C=C bond in the ring to form a resonance- stabilized carbocation. Show the mechanism of this cyclization starting from the enol (i.e. double…

Name theName the compounds and why? compounds and why?

What is the proper name for this compound? Br CI Br CIC -U

What are these chemical compounds

Name the following organic compounds: CH3 CH,— - CH3- - - CH3 CH compound - CH₂ CH₂ CH₂ CH I CH₂ | CH3 CH₂ - CH₂ | CH,−C–CH,– CH, CH, CH₂ - CH₂ - CH₂ - CH3 CH₂ - CH₂ CH - - CH3 - CH₂ - CH₂ name П 0 0

dles? HH H H BH

Which molecule is a complete organic molecule (i.e. all atoms are shown correctly)? A H. c=C–C= C–H H C H. C=C-C-C-H | H. H. C H. C- D H. нн . C С —С—Н C=C–C- C-H H H. ОН Н А I-0-I エーO I-Ú-I I-U-I I-U-I エー○