After successfully synthesis of 4Aa in multigram scale, we check utility through the execution of post synthetic modifications, thereby exemplifying their functional versatility. The N-allylation and O-allylation of 4Aa was performed with allyl bromide and K2CO3 as base in DMF solvent to obtained 5a. Then same reaction performed in absence of base we obtained only O-allylation product 5b. The isolated 5b can be further factionalized to N-substituted product 5d. As like 5b, 4Aa can be further functionalized O methylated product 5c (Scheme 5). (for details, check ESI procedure F1-F3).