18. Which sequence of reagents would be expected to accomplish the transformation of 1-butyne shown below?...
Choose the sequence of reagents which would best accomplish the following transformation: 2-bromopropane ----------> 1,2-dibromopropane [(R) + (S)] 01. (i) KMnO4, NaOH in water at 0 °C 2. (i) Br2 in CCl4 (ii) excess NaNH2 (iii) CH31 (iv) H20, H2SO4, HgSO4 Choose the sequence of reagents which would best accomplish the following transformation: 2-bromopropane ---------> 1,2-dibromopropane [(R) + (S)] 01. (i) KMnO4, NaOH in water at 0 °C 2. (i) Br2 in CC14 (ii) excess NaNH2 (iii) CH3 (iv) H20,...
In each reaction box, place the best reagent and conditions from the list below. H CEC-H H2, Lindlar catalyst CH3CH20i H20, H2SO4, HgSO4 CH3C Br2 2-equiv. CH3CH2CH2Cl BH3/THF NaOH HBr 2-equiv. H202/ NaOH HBr 1-equiv. NaNH Br2 1-equiv
In each reaction box, place the best reagent and Conditions from the list below. H C C H Br Br H2, Lindlar catalyst H20, H2SO4, Hgso4 CH3CH2Br HBr 1-equiv BH3/THF HBr 2-equiv CH3CH2CH2Br CH3Br H202/NaOH Br2 1-equiv NaOH NaNH2 Br2 2-equiv
1. PREDICT THE PRODUCT: Provide the structure of the major product expected from the following reactions or reaction sequences. Make sure you account for any regio- and/or stereochemistry! (24 pts.) H2O 1. Hg(OAC), CH, OH 2. NaBH H2SO4 H20 1) BH-THF 2) H202, KOH HBr Bry, H2O HBr ROOR 1. BH3-THF 2. H2O2, NaOH H20, H2SO4 1. NaNH2 H2 H-CEC-CH2 CH2 CH3 2. CH CH Br Lindlar cat 1. Sia BH-THF 2. H2O2, H2O
25) What reagents can best be used to accomplish the following transformation? A) H+, H2O B)1. BH3-THF 2. Ho, H202 C)1. Hg(OAc)2, H2O/THF 2. NaBH4 D)1. Hg(O2CCF3)2 CH3OH 2. NaBH4 E) NaOH, H20
Which sequence of reactions would be appopriate to accomplish this transformation? 70. CH2 Cul CHaCH2Br (A) PBrs 1.THF-8% 2. H202 /NaOH/H2O (B) 1. Hg(OAc)2 HBr(gMgH2C-CH2 THF / H20 Et2O 2. NaBH (C) O3 (CH3CH2CH2)2CuLi Et20 CHCla 780 D) MCPBA CH3CH2MgBr 312 Et20 CH2Cl2 100
The transformation shown above is carried out by which of the following reagents? | OH | CH3CH2CH=CH2 CH2CH2CH2CH2 O H20, H2S04 O Hg(02CCH3)2/H20 then NaBH4 O BH3/THF then H202, NaOH OKOH O H20, peroxides
5.27 Give the principal organic products expected when 1-butene reacts with each of the following reagents (a) Br2 in CH2Cl2 solvent (b) O3, -78 oc (c) product of (b) with (CH3)2S (d) product of (b) with H202 (e) O2, flame (f) HBr (g) I2, H20 (h) H2, Pt/C (i) HBr, peroxides (j) BH3 in tetrahydrofuran (THF) (k) product of G) with NaOH, H,02 (1) Hg(OAc), H2O (m) product of (I) with NaBH4/NaOH (n) HI (o) HI, AIBN
Select the reagents you would use to accomplish the syntheses shown below in no more than the number of steps specified. List the letters of the reagents in the order that they are used; example: fa. Reagents Available a. HBr b. PBr3 C. (CH3CH2CH2CH2)2Culi f. CH31 g. Hg(OAC)2, H2O, THF; then NaBH4 h. Cl2, light d. (CH3)2Culi I. KOH j. NBS (N-bromosuccinimide) e. BH3, THF; then H202, OH - он CH3 Use 2 steps: V - M Use 3 steps:
QUESTION 5 What reagents can best be used to accomplish the following transformation? 1. BH3-THF 2. HO- H202 NaOH, H20 H+ H20 1.03 2. (CH3)2