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Stretch the structure for (S)-3-bromo-2-methylpentane and add the stereochemistry at all stereogenic centers.
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- 4-Chloro-2-pentene has a double bond that can have either the E or the Z configuration and a stereogenic center that can have either the R or the S configuration. How many stereoisomers arepossible altogether? Draw the structure of each, and group the pairs of enantiomers.For the molecule given, prioritize each substituent on the stereogenic carbon, and assign absolute stereochemistry.Write structures for products A, B, C, and D showinf stereochemistry. (Hint: B and D are stereoisomers)
- Use the given template to draw three-dimensional line structures of (2S, 5R)-5-amino-2-hydroxylhexanal. Clearly show the three-dimensional arrangement of the substituents on the stereogenic centres.How many products are possible from the reaction ? Take stereochemistry into accountBy considering the stereochemical requirements for E2-elimination, and using an appropriate illustration need help indicating whether the more stable conformer (conformer B) of trans-1 can undergo E2 elimination. Thank you :)
- Draw the structures for (Z)-3-methylhex-3-ene and the two major organic products for its reaction with HBr. Be sure to show all stereoisomers using wedge and dash stereochemistry at any chirality center.Draw the structure of (1 R , 2 R )-1-bromo-2-chlorocyclobutane. Take particular care to indicate stereochemistry properly1- Chloro-1,2-diphenyletane can undergo E2 elimination to give either cis- or trans-1,2-diphenylethylene (stilbene). Draw New man projections of the reactive conformations leading to both possible products, and suggest a reason why trans alkene is the major product?
- Draw and name all stereoisomers of 3-chlorohepta-2,4-diene using the E-Z nomenclature.A difficult problem in the synthesis of PGF2α is the introduction of the OH group at C15 in the desired conguration.a. Label this stereogenic center as R or S.b. A well known synthesis of PGF2α involves reaction of A with Zn(BH4)2, a metal hydride reagent similar in reactivity to NaBH4, to form two isomeric products, B and C. Draw their structures and indicate their stereochemical relationship.c. Suggest a reagent to convert A to the single stereoisomer X.Draw the structure of (2R,5S)-2-chloro-5-methylheptanal. Be sure to add all bonds to the stereocenters (including bonds to hydrogen)