synthetic strategies

Which of the following statements best describes retrosynthesis?

• The reaction conditions required to convert the product of a reaction back to the original starting materials

• A strategy used to design a synthesis of a target molecule by working back from the target to simple starting materials

• he design of a synthetic scheme using cheap, traditional reagents, rather than expensive modern reagents

• The design of reaction conditions such that an equilibrium reaction is pushed towards the products rather than the starting materials.

Which of the following statements best describes a disconnection in retrosynthesis?

• A disconnection involves a theoretical disconnection of a bond in a target structure in order to identify simpler structures that could be linked through the formation of that bond

• A disconnection involves identifying stages where a bond is split in the corresponding synthesis.

• A disconnection identifies retrosynthetic stages which would not be feasible in the corresponding synthesis

• A disconnection describes the reaction conditions required to split a target structure into simpler molecules.

Which of the following synthons is an example of Umpulong ?

• 
• 
• 
• 

Which of the synthons (A-D) represents the following reagent?

• 
• 
• 
• 

Which reaction would result in a structure having a cyclohexene such as the following as a molecular signature?

describe a synthon?

what is regioselectivity

The extra carbon in salbutamol prevents

In diels alder reaction which of the following is major product

• exo

• endo

which of the following is a cyclisation reaction

• Michael addition

• robinson annelation