Heck reactions take place with alkynes as well as alkenes. The following conversion involves an intramolecular Heck reaction followed by an intermolecular Heck. Work out the reaction sequence on a separate sheet of paper, and then draw the structure of the palladium-containing intermediate A. 1% mol Pd(OAc)₂ CO₂Me 4% mol Ph₂P CH₂CN A (1 ring) B (2 rings) C (2 rings) • Consider E/Z stereochemistry of alkenes. • You do not have to explicitly draw H atoms. • Do not include lone pairs in your answer. They will not be considered in the grading. • Use R1 to represent the palladium complex. The R group tool is located in the charges and lone pairs drop-down menu. ) - [ MeO₂C

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Heck reactions take place with alkynes as well as alkenes. The following conversion involves an intramolecular Heck reaction followed by an
intermolecular Heck.
Work out the reaction sequence on a separate sheet of paper, and then draw the structure of the palladium-containing intermediate A.
1% mol Pd(OAc)₂2
CO₂Me
4% mol Ph P
CH₂CN
A
(1 ring)
C
(2 rings)
(2 rings)
• Consider E/Z stereochemistry of alkenes.
• You do not have to explicitly draw H atoms.
• Do not include lone pairs in your answer. They will not be considered in the grading.
• Use R1 to represent the palladium complex. The R group tool is located in the charges and lone pairs drop-down menu.
0-
✪
Sn [F
MeO₂C
Transcribed Image Text:Heck reactions take place with alkynes as well as alkenes. The following conversion involves an intramolecular Heck reaction followed by an intermolecular Heck. Work out the reaction sequence on a separate sheet of paper, and then draw the structure of the palladium-containing intermediate A. 1% mol Pd(OAc)₂2 CO₂Me 4% mol Ph P CH₂CN A (1 ring) C (2 rings) (2 rings) • Consider E/Z stereochemistry of alkenes. • You do not have to explicitly draw H atoms. • Do not include lone pairs in your answer. They will not be considered in the grading. • Use R1 to represent the palladium complex. The R group tool is located in the charges and lone pairs drop-down menu. 0- ✪ Sn [F MeO₂C
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