- GRANZYME B DIRECTED IMAGING AND THERAPY
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Provided herein are heterocyclic compounds useful for imaging Granzyme B. Methods of imaging Granzyme B, combination therapies, and kits comprising the Granzyme B imaging agents are also provided.
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Page/Page column 82; 98
(2019/09/04)
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- Regiodivergent Enantioselective γ-Additions of Oxazolones to 2,3-Butadienoates Catalyzed by Phosphines: Synthesis of α,α-Disubstituted α-Amino Acids and N,O-Acetal Derivatives
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Phosphine-catalyzed regiodivergent enantioselective C-2- and C-4-selective γ-additions of oxazolones to 2,3-butadienoates have been developed. The C-4-selective γ-addition of oxazolones occurred in a highly enantioselective manner when 2-aryl-4-alkyloxazol-5-(4H)-ones were employed as pronucleophiles. With the employment of 2-alkyl-4-aryloxazol-5-(4H)-ones as the donor, C-2-selective γ-addition of oxazolones took place in a highly enantioselective manner. The C-4-selective adducts provided rapid access to optically enriched α,α-disubstituted α-amino acid derivatives, and the C-2-selective products led to facile synthesis of chiral N,O-acetals and γ-lactols. Theoretical studies via DFT calculations suggested that the origin of the observed regioselectivity was due to the distortion energy that resulted from the interaction between the nucleophilic oxazolide and the electrophilic phosphonium intermediate.
- Wang, Tianli,Yu, Zhaoyuan,Hoon, Ding Long,Phee, Claire Yan,Lan, Yu,Lu, Yixin
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p. 265 - 271
(2016/01/25)
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- Regioselective synthesis of tetrasubstituted pyrroles by 1,3-dipolar cycloaddition and spontaneous decarboxylation
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We developed a novel regioselective synthesis of tetrasubstituted pyrroles via the classic 1,3-dipolar cycloaddition of α,β-unsaturated benzofuran-3(2H)-one and azlactones (1) followed by spontaneous decarboxylation. The complete regiochemical control of tetrasubstituted pyrroles was confirmed by the orthogonal synthesis of complementary regioisomers (7a and 7b) simply by using different azlactones (1a and 1b, respectively).
- Kim, Yongju,Kim, Jonghoon,Park, Seung Bum
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supporting information; experimental part
p. 17 - 20
(2009/08/07)
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- INTRA VS INTERMOLECULAR AMIDOALKILATION OF AROMATICS
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Three tipes of intramolecular amidoalkylation reactions of aromatics, two endotrigonal and one exotrigonal (I, II, III), leading to indolone, N-acylisoquinolines, isoquinolone and benzazepinone derivatives were studied.In the presence of external aromatic nucleophiles competing intermolecular amidoalkylations were observed (1->2, 13->14).The mechanism and the synthetic limitations of the three types of cyclization is discussed.
- Ishai, D. Ben,Sataty, I.,Peled, N.,Goldshare, R.
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p. 439 - 450
(2007/10/02)
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- INTER VS INTRAMOLECULAR AMIDOALKYLATIONS OF AROMATICS - A NEW SYNTHESIS OF OXINDOLES, ISOQUINOLONES AND BENZAZEPINONES
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A new synthesis of oxindoles (8) isoquinolones (5) and benzazepinones (10) by the intramolecular amidoalkylation of aromatic amides of bismethoxycarbonylaminoacetic acid (4, 7, 9) is described.
- Ben-Ishai, D.,Peled, N.,Sataty, I
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p. 569 - 572
(2007/10/02)
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