Homework Answers
Reaction 1 and 2 both will give us the desired products.
Reaction 3 is not giving giving the asked product.
Reaction 1 and 2 involve wittig reaction which converts carbonyl compounds into a olefin along with increase in the carbon chain size using a phosphorus ylide.
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Select the method(s) that will give the following alkene as a MAJOR product. Ph3p+ -CH2 2....
Select the method(s) that will give the following alkene as a MAJOR product. Ph:P CH2 1....
Select the method(s) that will give the following alkene as a MAJOR product. Ph:P CH2 1. CH,Mg 2. Hota 0°C 3. POCI/pyridine 1. + Mg 2. Ho a o'c 3. H O Heat 1 only 3 only 2 only • 1 and 3 1 and 2 All of them
3. (24 pts) Provide the structure(s) of the major product formed in the following reactions. Be...
3. (24 pts) Provide the structure(s) of the major product formed in the following reactions. Be sure to show any significant stereochemical details. (a) 2 1. -OH,H,O 2.H,O", heat (b) ci AICI (C) SH HS H H,SO -OH 1. Na,Cr,O, H,SO4 2. SOCI, pyridine 3. excess (CH,CH2)2NH excess (e)
Give the structure of the major organic product(s) for each if the following reactions (or reaction...
Give the structure of the major organic product(s) for each if
the following reactions (or reaction sequences). Show all hydrogens
when they are critical, e.g. for aldehydes
3. Give the structure of the major organic product(s) for each of the following reactions (or reaction sequences). Show all hydrogens when they are critical, e.g. for aldehydes. Hot 3 O + Brz Born b. 2 8Hz WH2 + CH₃ CH-C-0H - So A 70 DE CH2 Br 0 Hz cat per B...
Give the major organic product(s) for the following reaction (without stereochemistry) Br2 CH3OH Give the major...
Give the major organic product(s) for the following reaction (without stereochemistry) Br2 CH3OH Give the major organic product(s) for the following reaction CH₂=CH2 Cz? Give the major organic product(s) for the following reaction (It is necessary to show stereochemistry ONLY for cyclic alkenes) Get he Give the major organic product(s) for the following reaction Br2 ensom? CH3OH Give the major organic product(s) for the following reaction (without stereochemistry) Br2 H20
13) Which of the following is/are the main product(s) of the following reaction? (2 pts) CH2=CH-CH-CH2...
13) Which of the following is/are the main product(s) of the following reaction? (2 pts) CH2=CH-CH-CH2 HBr ? A) CH2CH=CHCH3 CH2CH2CH=CH2 C) CH3CHCH=CH2 D) A and B E) A and C 14) What is/are the product(s) from the following reaction? (2 pts) e + Ha ? CHCH A) I only B) Il only C) I is minor, II is major D) I is major, II is minor E) equal amounts of I and II 16) Provide the structure of the...
What is (are) the major product(s) for the following reaction? Product tBuổ "CH(CH2 M tBuOK, tBuOH...
What is (are) the major product(s) for the following reaction? Product tBuổ "CH(CH2 M tBuOK, tBuOH BLOK, BUOH, ? tBu-O "tu-o- O CH(CH3)2 CH(CH3)2 CH(CH3)2 T .CH(CH3)2 CH(CH3)2 No Reactions at all
Which of the following is true of the mechanism of BH3 addition to an alkene? Select...
Which of the following is true of the mechanism of
BH3 addition to an alkene?
Select one:
a. BH3 adds to alkene by formation of a
strained 3-membered ring intermediate.
b. B-H adds to C=C in a concerted, SYN
addition.
c. B-H adds to C=C in a step-wise, SYN
addition.
d. B-H attaches to alkene with ANTI
stereochemistry.
What is the organic product formed in the following sequence of reactions? CH2 (1) HgOAcz + H2O V (2) NaBH4 2) NAB...
tion, 70 pts) 3. (24 pts) Provide the structure(s) of the major product formed in the...
tion, 70 pts) 3. (24 pts) Provide the structure(s) of the major product formed in the following reactions. Be sure to show any significant stereochemical details. (d) OH 1. Na,Cr,O,, H2SO4 2. SOCl2, pyridine 3. excess (CH,CH2)2NH excess Bry, H,0*
CHM230 Class Worksheet Alkene and Alkyne reactions Give the major product of each of the following...
CHM230 Class Worksheet Alkene and Alkyne reactions Give the major product of each of the following reactions: CH,CH,C=CH + 1 equivalent HCI H2 + Lindlar catalyst CH3CHCH2C=CCHCH3 + CICH + H+ + CH3CH2OH CH3CH2C=CH + 2 equivalents HCI CH,CH2C=C-CH3 + 2 equivalents HBr + H+ + H2O + excess HBr CH,CH.C=C-CH3 + excess Hy/Lindlar 2 + excess H/PUC CH3C=C-CH3 + H2O / H / Hg2+ ox.. + HBr + NaNH2 + CH CH Br Given the following alkyne, provide the...
Predict the product(s) for the following reactions. If no significant reaction occurs, then write "NR." If...
Predict the product(s) for the following reactions. If no significant reaction occurs, then write "NR." If you write "NR" make sure to provide an explanation. 1) (CH2=CH) CALI 2) H20 pyridine CH,C1, H.07
Select the method(s) that will give the following alkene as a MAJOR product. Ph:P CH2 1. CH,Mg 2. Hota 0°C 3. POCI/pyridine 1. + Mg 2. Ho a o'c 3. H O Heat 1 only 3 only 2 only • 1 and 3 1 and 2 All of them
3. (24 pts) Provide the structure(s) of the major product formed in the following reactions. Be sure to show any significant stereochemical details. (a) 2 1. -OH,H,O 2.H,O", heat (b) ci AICI (C) SH HS H H,SO -OH 1. Na,Cr,O, H,SO4 2. SOCI, pyridine 3. excess (CH,CH2)2NH excess (e)
Give the structure of the major organic product(s) for each if
the following reactions (or reaction sequences). Show all hydrogens
when they are critical, e.g. for aldehydes
3. Give the structure of the major organic product(s) for each of the following reactions (or reaction sequences). Show all hydrogens when they are critical, e.g. for aldehydes. Hot 3 O + Brz Born b. 2 8Hz WH2 + CH₃ CH-C-0H - So A 70 DE CH2 Br 0 Hz cat per B...
Give the major organic product(s) for the following reaction (without stereochemistry) Br2 CH3OH Give the major organic product(s) for the following reaction CH₂=CH2 Cz? Give the major organic product(s) for the following reaction (It is necessary to show stereochemistry ONLY for cyclic alkenes) Get he Give the major organic product(s) for the following reaction Br2 ensom? CH3OH Give the major organic product(s) for the following reaction (without stereochemistry) Br2 H20
13) Which of the following is/are the main product(s) of the following reaction? (2 pts) CH2=CH-CH-CH2 HBr ? A) CH2CH=CHCH3 CH2CH2CH=CH2 C) CH3CHCH=CH2 D) A and B E) A and C 14) What is/are the product(s) from the following reaction? (2 pts) e + Ha ? CHCH A) I only B) Il only C) I is minor, II is major D) I is major, II is minor E) equal amounts of I and II 16) Provide the structure of the...
What is (are) the major product(s) for the following reaction? Product tBuổ "CH(CH2 M tBuOK, tBuOH BLOK, BUOH, ? tBu-O "tu-o- O CH(CH3)2 CH(CH3)2 CH(CH3)2 T .CH(CH3)2 CH(CH3)2 No Reactions at all
Which of the following is true of the mechanism of
BH3 addition to an alkene?
Select one:
a. BH3 adds to alkene by formation of a
strained 3-membered ring intermediate.
b. B-H adds to C=C in a concerted, SYN
addition.
c. B-H adds to C=C in a step-wise, SYN
addition.
d. B-H attaches to alkene with ANTI
stereochemistry.
What is the organic product formed in the following sequence of reactions? CH2 (1) HgOAcz + H2O V (2) NaBH4 2) NAB...
tion, 70 pts) 3. (24 pts) Provide the structure(s) of the major product formed in the following reactions. Be sure to show any significant stereochemical details. (d) OH 1. Na,Cr,O,, H2SO4 2. SOCl2, pyridine 3. excess (CH,CH2)2NH excess Bry, H,0*
CHM230 Class Worksheet Alkene and Alkyne reactions Give the major product of each of the following reactions: CH,CH,C=CH + 1 equivalent HCI H2 + Lindlar catalyst CH3CHCH2C=CCHCH3 + CICH + H+ + CH3CH2OH CH3CH2C=CH + 2 equivalents HCI CH,CH2C=C-CH3 + 2 equivalents HBr + H+ + H2O + excess HBr CH,CH.C=C-CH3 + excess Hy/Lindlar 2 + excess H/PUC CH3C=C-CH3 + H2O / H / Hg2+ ox.. + HBr + NaNH2 + CH CH Br Given the following alkyne, provide the...
Predict the product(s) for the following reactions. If no significant reaction occurs, then write "NR." If you write "NR" make sure to provide an explanation. 1) (CH2=CH) CALI 2) H20 pyridine CH,C1, H.07
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