Yes Assyl, the 14-phenylpropanoyl ester was what I was talking about at the end of my last post but I see how I confused things by talking about enol ethers forming at the 6 position which makes absolutely no sense with regard to acylation. The 14-phenylpropoxy ether seems to be too much of a hassle considering the need for NaH, DMF and a Schlenk line. Naltrexone and Pyridine in an ice cooled flask fitted with a septum, then syringe in 2.2 equivalents of hydrocinnamoyl bromide or cinnamoyl bromide. Then CTH reduction (Pd/C, formate) to open up the cyclopropyl group and possibly reduce cinnamoyl's doublebond. This is definitely looking like it is the way to go. BTW is there any reason to choose cinnamoyl-Br over hydrocinnamoyl-Br with regard to a possibly improved yield of acylated material? Obviously, cinnamoyl-Br will likely be more accessible (and cheaper) but will also necessitate a subsequent reduction.
I was very excited about the potential for exploring a new means of getting to the 14-phenylpropoxy ether considering the unique characteristics of the cinnamyl group, but I've been mind-synthing N-isobutyl-14-phenylpropanoylnornaltrexone for some time now. Check out the picture below where MM2 yielded the aromatic ring of the ester in the ideal "perpendicular and slightly below ring A". Even the N-isobutyl group is in the agonist conformation! The one thing I haven't done is minimized other potential orientations to determine just how much it likes to take on our desired super-agonist position. (picture correction: 4th caption should say "isobutyl", not "t-butyl")
I'm totally with you with regard to the "war on drugs" issue. I wanted to understand and explore as many possibilities as I could with regard to this naltrexone conversion but it's about time that a soldier did some real recon so that they can spread any valuable intel to the rest of the troops!
I was very excited about the potential for exploring a new means of getting to the 14-phenylpropoxy ether considering the unique characteristics of the cinnamyl group, but I've been mind-synthing N-isobutyl-14-phenylpropanoylnornaltrexone for some time now. Check out the picture below where MM2 yielded the aromatic ring of the ester in the ideal "perpendicular and slightly below ring A". Even the N-isobutyl group is in the agonist conformation! The one thing I haven't done is minimized other potential orientations to determine just how much it likes to take on our desired super-agonist position. (picture correction: 4th caption should say "isobutyl", not "t-butyl")
I'm totally with you with regard to the "war on drugs" issue. I wanted to understand and explore as many possibilities as I could with regard to this naltrexone conversion but it's about time that a soldier did some real recon so that they can spread any valuable intel to the rest of the troops!