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 Synthesis of a chiral 3,3′-di-tert-butyl-2,2′-bipyrrole, published in 2003-06-30, which mentions a compound: 2199-44-2, mainly applied to chiral bipyrroledicarboxylate derivative preparation x ray; crystal structure chiral bipyrroledicarboxylate derivative; mol structure chiral bipyrroledicarboxylate derivative; atropisomer bipyrroledicarboxylate derivative preparation x ray, Product Details of 2199-44-2.
Di-Et 3,3′-di-tert-butyl-4,4′-dimethyl-2,2′-bipyrrole-5,5′-dicarboxylate (I) was synthesized in four steps from Et 3,5-dimethyl-1H-pyrrole-2-carboxylate. The CH2 hydrogens of the Et ester groups of the former are diastereotopic in the 1H-NMR, consistent with axial chirality of the bipyrrole and restricted rotation about the 2,2′-bipyrrole bond, due to the tert-Bu groups. X-ray anal. of crystalline I shows that the pyrrole rings are twisted out of coplanarity by 84.5°.
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com