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128368-43-4

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128368-43-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128368-43-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,3,6 and 8 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 128368-43:
(8*1)+(7*2)+(6*8)+(5*3)+(4*6)+(3*8)+(2*4)+(1*3)=144
144 % 10 = 4
So 128368-43-4 is a valid CAS Registry Number.

128368-43-4Relevant articles and documents

Palladium-Catalyzed Carbamoyl-Carbamoylation/ Carboxylation/Thioesterification of Alkene-Tethered Carbamoyl Chlorides Using Mo(CO)6 as the Carbonyl Source

Chen, Chen,Huang, Yujie,Ding, Jie,Liu, Liying,Zhu, Bolin

supporting information, p. 794 - 801 (2022/01/04)

We reported a palladium-catalyzed carbamoyl-carbamoylation/carboxylation/thioesterification of alkene-tethered carbamoyl chlorides using Mo(CO)6 as the carbonyl source. The reactions were typically performed with good functional group compatibility and tolerated different nucleophiles (amines, alcohols, phenols, thiols and water), which provided a new access to amidated/esterificated/thioesterificated/carboxylated oxindoles or lactams bearing an all-carbon quaternary stereocenter under CO gas-free conditions. Furthermore, natural product mutation and divergent late-stage derivatization are the important practical features.

Enantioselective Intramolecular Copper-Catalyzed Borylacylation

Whyte, Andrew,Burton, Katherine I.,Zhang, Jingli,Lautens, Mark

supporting information, p. 13927 - 13930 (2018/10/02)

An enantioselective copper-catalyzed intramolecular borylacylation is reported. The reaction proceeds through an initial enantioselective borylcupration of the styrene, followed by a nucleophilic attack on the tethered carbamoyl chloride. The products, chiral borylated 3,3-disubstituted oxindoles, were generated in excellent yields and enantioselectivities. The versatile carbon–boron bond provides a platform for a wide array of diversification.

Synthesis of (±)-esermethole via an intramolecular carbamoylketene-alkene [2+2] cycloaddition

Ozawa, Tsukasa,Kanematsu, Makoto,Yokoe, Hiromasa,Yoshida, Masahiro,Shishido, Kozo

, p. 2927 - 2932 (2013/02/21)

A synthesis of (±)-esermethole (2), a synthetic precursor of physostigmine (1), has been accomplished by using an intramolecular carbamoylketene-alkene [2+2] cycloaddition followed by nitrone-mediated regioselective ring expansion for the construction of the basic carbon framework of 2 as the key steps.

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