In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Aromatase inhibitors. Synthesis and evaluation of mammary tumor inhibiting activity of 3-alkylated 3-(4-aminophenyl)piperidine-2,6-diones, published in 1986, which mentions a compound: 616-14-8, mainly applied to aminophenylpiperidinedione preparation antitumor; piperidinedione aminophenyl preparation antitumor; aromatase placental inhibition aminophenylpiperidinedione; desmolase adrenal inhibition aminophenylpiperidinedione; estradiol inhibition aminophenylpiperidinedione, COA of Formula: C5H11I.
Piperidinediones I (R = H, Me, Et, Pr, CHMe2, CH2CHMe2, CHMeEt, pentyl, isopentyl, CH2CHMeEt, sec-pentyl, hexyl, heptyl) were prepared by alkylating PhCH2CN, addition reaction of PhCHRCN with CH2:CHCN, hydrolysis and ring closure of NCCRPhCH2CH2CN, nitration, and reduction of the nitro group. In vitro I showed a stronger inhibition of human placental aromatase than aminoglutethimide (II). The most active derivative, I (R = isopentyl), showed a 93-fold stronger inhibition than II. I, except I (R = CHMe2, CH2CHMe2, CHMeEt) exhibited equal or lower inhibition of bovine adrenal desmolase than II. Many I showed a stronger inhibition of the plasma estradiol concentration of pregnant mare serum gonadotropin-primed rats than II. They inhibited the testosterone-stimulated tumor growth of ovariectomized 9,10-dimethyl-1,2-benzanthracene tumor-bearing rats more strongly than II. Being stronger and more selective inhibitors of the estrogen biosynthesis than II, some of the newly developed derivatives of II might be better candidates for the treatment of hormone-dependent human breast cancer.
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Reference:
Thiomorpholine – Wikipedia,
Thiomorpholine | C4H9NS – PubChem