Welcome to LookChem.com Sign In|Join Free

CAS

  • or

1227411-41-7

Post Buying Request

1227411-41-7 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

1227411-41-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1227411-41-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,7,4,1 and 1 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1227411-41:
(9*1)+(8*2)+(7*2)+(6*7)+(5*4)+(4*1)+(3*1)+(2*4)+(1*1)=117
117 % 10 = 7
So 1227411-41-7 is a valid CAS Registry Number.

1227411-41-7Downstream Products

1227411-41-7Relevant articles and documents

Catalytic asymmetric synthesis of 3-(α-hydroxy-ss-carbonyl) oxindoles by a ScIII-catalyzed direct aldol-type reaction

Shen, Ke,Liu, Xiaohua,Zheng, Ke,Li, Wei,Hu, Xiaolei,Lin, Lili,Feng, Xiaoming

supporting information; experimental part, p. 3736 - 3742 (2010/07/13)

A direct catalytic asymmetric aldol-type reaction of 3-substituted- 2oxindoles with glyoxal derivatives and ethyl trifluoropyruvate, catalyzed by a chiral N,N-'-dioxide-Sc(OTf)3 (Tf=trifluoromethanesulfonyl) complex, has been developed that tolerates a wide range of substrates. The reaction proceeds in good yields and excellent enantioselectivities (up to 93% yield, 99:1 diastereomeric ratio (dr), and > 99 % enantiomeric excess (ee)) under mild conditions, to deliver 3-(α-hydroxy-ss-carbonyl) oxindoles with vicinal quaternary-tertiary or quaternaryquaternary stereocenters. Even with 1 mol% catalyst loading or on scaleup (10 mmol of starting material), maintenance of ee was observed, which showed the potential value of the catalyst system. In studies probing the reaction mechanism, a positive nonlinear effect was observed and ScIII-based enolate intermediates were detected by using ESIMS. On the basis of the experimental results and previous reports, a possible catalytic cycle was assumed.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 1227411-41-7